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Finding the Fourth Proportional to 458,000.10, 687,000.15 and 339,902.10

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Solution

The fourth proportional to 458,000.10, 687,000.15 and 339,902.10 is: 509,853.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,000.10 : 687,000.15 = 339,902.10 : x
  2. Step 2: Convert to fraction form
    458,000.10/687,000.15 = 339,902.10/x
  3. Step 3: Cross multiply
    458,000.10x = 687,000.15 × 339,902.10
  4. Step 4: Simplify right side
    458,000.10x = 233,512,793,685.32
  5. Step 5: Solve for x
    x = 233,512,793,685.32/458,000.10
  6. Step 6: Final answer
    x = 509,853.15

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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.