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Finding the Fourth Proportional to 454,357.20, 681,568.20 and 138,813.60

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Solution

The fourth proportional to 454,357.20, 681,568.20 and 138,813.60 is: 208,230.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,357.20 : 681,568.20 = 138,813.60 : x
  2. Step 2: Convert to fraction form
    454,357.20/681,568.20 = 138,813.60/x
  3. Step 3: Cross multiply
    454,357.20x = 681,568.20 × 138,813.60
  4. Step 4: Simplify right side
    454,357.20x = 94,610,935,487.52
  5. Step 5: Solve for x
    x = 94,610,935,487.52/454,357.20
  6. Step 6: Final answer
    x = 208,230.30

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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.