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Finding the Fourth Proportional to 615,885.76, 924,121.05 and 426,637.36

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Solution

The fourth proportional to 615,885.76, 924,121.05 and 426,637.36 is: 640,158.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,885.76 : 924,121.05 = 426,637.36 : x
  2. Step 2: Convert to fraction form
    615,885.76/924,121.05 = 426,637.36/x
  3. Step 3: Cross multiply
    615,885.76x = 924,121.05 × 426,637.36
  4. Step 4: Simplify right side
    615,885.76x = 394,264,565,092.43
  5. Step 5: Solve for x
    x = 394,264,565,092.43/615,885.76
  6. Step 6: Final answer
    x = 640,158.60

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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.