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Finding the Fourth Proportional to 478,465.85, 660,378.49 and 274,654.55

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Solution

The fourth proportional to 478,465.85, 660,378.49 and 274,654.55 is: 379,078.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,465.85 : 660,378.49 = 274,654.55 : x
  2. Step 2: Convert to fraction form
    478,465.85/660,378.49 = 274,654.55/x
  3. Step 3: Cross multiply
    478,465.85x = 660,378.49 × 274,654.55
  4. Step 4: Simplify right side
    478,465.85x = 181,375,957,964.94
  5. Step 5: Solve for x
    x = 181,375,957,964.94/478,465.85
  6. Step 6: Final answer
    x = 379,078.17

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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.