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Finding the Fourth Proportional to 615,298.90, 921,393.15 and 403,791.70

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Solution

The fourth proportional to 615,298.90, 921,393.15 and 403,791.70 is: 604,666.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,298.90 : 921,393.15 = 403,791.70 : x
  2. Step 2: Convert to fraction form
    615,298.90/921,393.15 = 403,791.70/x
  3. Step 3: Cross multiply
    615,298.90x = 921,393.15 × 403,791.70
  4. Step 4: Simplify right side
    615,298.90x = 372,050,906,406.86
  5. Step 5: Solve for x
    x = 372,050,906,406.86/615,298.90
  6. Step 6: Final answer
    x = 604,666.95

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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.