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Finding the Fourth Proportional to 363,908.60, 545,862.90 and 257,620.40

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Solution

The fourth proportional to 363,908.60, 545,862.90 and 257,620.40 is: 386,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,908.60 : 545,862.90 = 257,620.40 : x
  2. Step 2: Convert to fraction form
    363,908.60/545,862.90 = 257,620.40/x
  3. Step 3: Cross multiply
    363,908.60x = 545,862.90 × 257,620.40
  4. Step 4: Simplify right side
    363,908.60x = 140,625,418,643.16
  5. Step 5: Solve for x
    x = 140,625,418,643.16/363,908.60
  6. Step 6: Final answer
    x = 386,430.60

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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.