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Finding the Fourth Proportional to 630,171.38, 869,711.28 and 358,280.30

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Solution

The fourth proportional to 630,171.38, 869,711.28 and 358,280.30 is: 494,469.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,171.38 : 869,711.28 = 358,280.30 : x
  2. Step 2: Convert to fraction form
    630,171.38/869,711.28 = 358,280.30/x
  3. Step 3: Cross multiply
    630,171.38x = 869,711.28 × 358,280.30
  4. Step 4: Simplify right side
    630,171.38x = 311,600,418,311.78
  5. Step 5: Solve for x
    x = 311,600,418,311.78/630,171.38
  6. Step 6: Final answer
    x = 494,469.33

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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.