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Finding the Fourth Proportional to 639,068.42, 881,908.89 and 352,591.22

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Solution

The fourth proportional to 639,068.42, 881,908.89 and 352,591.22 is: 486,572.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,068.42 : 881,908.89 = 352,591.22 : x
  2. Step 2: Convert to fraction form
    639,068.42/881,908.89 = 352,591.22/x
  3. Step 3: Cross multiply
    639,068.42x = 881,908.89 × 352,591.22
  4. Step 4: Simplify right side
    639,068.42x = 310,953,331,453.95
  5. Step 5: Solve for x
    x = 310,953,331,453.95/639,068.42
  6. Step 6: Final answer
    x = 486,572.83

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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.