Home / 739,459.96-1,020,454.72-399,928.20

Finding the Fourth Proportional to 739,459.96, 1,020,454.72 and 399,928.20

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Solution

The fourth proportional to 739,459.96, 1,020,454.72 and 399,928.20 is: 551,900.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,459.96 : 1,020,454.72 = 399,928.20 : x
  2. Step 2: Convert to fraction form
    739,459.96/1,020,454.72 = 399,928.20/x
  3. Step 3: Cross multiply
    739,459.96x = 1,020,454.72 × 399,928.20
  4. Step 4: Simplify right side
    739,459.96x = 408,108,619,351.10
  5. Step 5: Solve for x
    x = 408,108,619,351.10/739,459.96
  6. Step 6: Final answer
    x = 551,900.90

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.