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Finding the Fourth Proportional to 427,666.77, 641,642.58 and 143,385.39

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Solution

The fourth proportional to 427,666.77, 641,642.58 and 143,385.39 is: 215,125.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,666.77 : 641,642.58 = 143,385.39 : x
  2. Step 2: Convert to fraction form
    427,666.77/641,642.58 = 143,385.39/x
  3. Step 3: Cross multiply
    427,666.77x = 641,642.58 × 143,385.39
  4. Step 4: Simplify right side
    427,666.77x = 92,002,171,573.91
  5. Step 5: Solve for x
    x = 92,002,171,573.91/427,666.77
  6. Step 6: Final answer
    x = 215,125.84

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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.