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Finding the Fourth Proportional to 460,884.52, 691,327.20 and 128,460.52

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Solution

The fourth proportional to 460,884.52, 691,327.20 and 128,460.52 is: 192,690.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,884.52 : 691,327.20 = 128,460.52 : x
  2. Step 2: Convert to fraction form
    460,884.52/691,327.20 = 128,460.52/x
  3. Step 3: Cross multiply
    460,884.52x = 691,327.20 × 128,460.52
  4. Step 4: Simplify right side
    460,884.52x = 88,808,251,602.14
  5. Step 5: Solve for x
    x = 88,808,251,602.14/460,884.52
  6. Step 6: Final answer
    x = 192,690.90

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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.