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Finding the Fourth Proportional to 630,716.40, 944,519.40 and 419,209.20

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Solution

The fourth proportional to 630,716.40, 944,519.40 and 419,209.20 is: 627,780.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,716.40 : 944,519.40 = 419,209.20 : x
  2. Step 2: Convert to fraction form
    630,716.40/944,519.40 = 419,209.20/x
  3. Step 3: Cross multiply
    630,716.40x = 944,519.40 × 419,209.20
  4. Step 4: Simplify right side
    630,716.40x = 395,951,222,058.48
  5. Step 5: Solve for x
    x = 395,951,222,058.48/630,716.40
  6. Step 6: Final answer
    x = 627,780.13

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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.