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Finding the Fourth Proportional to 608,137.60, 912,354.88 and 428,573.28

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Solution

The fourth proportional to 608,137.60, 912,354.88 and 428,573.28 is: 642,964.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,137.60 : 912,354.88 = 428,573.28 : x
  2. Step 2: Convert to fraction form
    608,137.60/912,354.88 = 428,573.28/x
  3. Step 3: Cross multiply
    608,137.60x = 912,354.88 × 428,573.28
  4. Step 4: Simplify right side
    608,137.60x = 391,010,923,445.61
  5. Step 5: Solve for x
    x = 391,010,923,445.61/608,137.60
  6. Step 6: Final answer
    x = 642,964.56

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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.