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Finding the Fourth Proportional to 643,874.08, 888,505.68 and 357,377.44

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Solution

The fourth proportional to 643,874.08, 888,505.68 and 357,377.44 is: 493,158.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,874.08 : 888,505.68 = 357,377.44 : x
  2. Step 2: Convert to fraction form
    643,874.08/888,505.68 = 357,377.44/x
  3. Step 3: Cross multiply
    643,874.08x = 888,505.68 × 357,377.44
  4. Step 4: Simplify right side
    643,874.08x = 317,531,885,343.86
  5. Step 5: Solve for x
    x = 317,531,885,343.86/643,874.08
  6. Step 6: Final answer
    x = 493,158.36

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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.