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Finding the Fourth Proportional to 453,387.90, 625,843.72 and 389,469.18

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Solution

The fourth proportional to 453,387.90, 625,843.72 and 389,469.18 is: 537,612.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,387.90 : 625,843.72 = 389,469.18 : x
  2. Step 2: Convert to fraction form
    453,387.90/625,843.72 = 389,469.18/x
  3. Step 3: Cross multiply
    453,387.90x = 625,843.72 × 389,469.18
  4. Step 4: Simplify right side
    453,387.90x = 243,746,840,436.55
  5. Step 5: Solve for x
    x = 243,746,840,436.55/453,387.90
  6. Step 6: Final answer
    x = 537,612.14

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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.