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Finding the Fourth Proportional to 500,448.48, 690,620.77 and 271,005.86

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Solution

The fourth proportional to 500,448.48, 690,620.77 and 271,005.86 is: 373,989.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,448.48 : 690,620.77 = 271,005.86 : x
  2. Step 2: Convert to fraction form
    500,448.48/690,620.77 = 271,005.86/x
  3. Step 3: Cross multiply
    500,448.48x = 690,620.77 × 271,005.86
  4. Step 4: Simplify right side
    500,448.48x = 187,162,278,363.11
  5. Step 5: Solve for x
    x = 187,162,278,363.11/500,448.48
  6. Step 6: Final answer
    x = 373,989.11

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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.