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Finding the Fourth Proportional to 288,380.10, 431,549.55 and 251,346.90

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Solution

The fourth proportional to 288,380.10, 431,549.55 and 251,346.90 is: 376,130.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,380.10 : 431,549.55 = 251,346.90 : x
  2. Step 2: Convert to fraction form
    288,380.10/431,549.55 = 251,346.90/x
  3. Step 3: Cross multiply
    288,380.10x = 431,549.55 × 251,346.90
  4. Step 4: Simplify right side
    288,380.10x = 108,468,641,588.90
  5. Step 5: Solve for x
    x = 108,468,641,588.90/288,380.10
  6. Step 6: Final answer
    x = 376,130.81

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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.