Home / 1,339,429.80-2,009,144.70-342,157.80

Finding the Fourth Proportional to 1,339,429.80, 2,009,144.70 and 342,157.80

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Solution

The fourth proportional to 1,339,429.80, 2,009,144.70 and 342,157.80 is: 513,236.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339,429.80 : 2,009,144.70 = 342,157.80 : x
  2. Step 2: Convert to fraction form
    1,339,429.80/2,009,144.70 = 342,157.80/x
  3. Step 3: Cross multiply
    1,339,429.80x = 2,009,144.70 × 342,157.80
  4. Step 4: Simplify right side
    1,339,429.80x = 687,444,530,433.66
  5. Step 5: Solve for x
    x = 687,444,530,433.66/1,339,429.80
  6. Step 6: Final answer
    x = 513,236.70

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Half scale
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Double scale
Find fourth proportional to 1,339,430.80, 2,009,146.20 and 342,158.80
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.