Home / 613,316.20-919,974.30-424,359.40

Finding the Fourth Proportional to 613,316.20, 919,974.30 and 424,359.40

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Solution

The fourth proportional to 613,316.20, 919,974.30 and 424,359.40 is: 636,539.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,316.20 : 919,974.30 = 424,359.40 : x
  2. Step 2: Convert to fraction form
    613,316.20/919,974.30 = 424,359.40/x
  3. Step 3: Cross multiply
    613,316.20x = 919,974.30 × 424,359.40
  4. Step 4: Simplify right side
    613,316.20x = 390,399,741,963.42
  5. Step 5: Solve for x
    x = 390,399,741,963.42/613,316.20
  6. Step 6: Final answer
    x = 636,539.10

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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.