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Finding the Fourth Proportional to 630,515.40, 944,217.90 and 419,008.20

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Solution

The fourth proportional to 630,515.40, 944,217.90 and 419,008.20 is: 627,478.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,515.40 : 944,217.90 = 419,008.20 : x
  2. Step 2: Convert to fraction form
    630,515.40/944,217.90 = 419,008.20/x
  3. Step 3: Cross multiply
    630,515.40x = 944,217.90 × 419,008.20
  4. Step 4: Simplify right side
    630,515.40x = 395,635,042,686.78
  5. Step 5: Solve for x
    x = 395,635,042,686.78/630,515.40
  6. Step 6: Final answer
    x = 627,478.79

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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.