Home / 920,130.80-1,380,239.40-289,065.20

Finding the Fourth Proportional to 920,130.80, 1,380,239.40 and 289,065.20

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Solution

The fourth proportional to 920,130.80, 1,380,239.40 and 289,065.20 is: 433,611.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,130.80 : 1,380,239.40 = 289,065.20 : x
  2. Step 2: Convert to fraction form
    920,130.80/1,380,239.40 = 289,065.20/x
  3. Step 3: Cross multiply
    920,130.80x = 1,380,239.40 × 289,065.20
  4. Step 4: Simplify right side
    920,130.80x = 398,979,178,208.88
  5. Step 5: Solve for x
    x = 398,979,178,208.88/920,130.80
  6. Step 6: Final answer
    x = 433,611.37

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Double scale
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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.