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Finding the Fourth Proportional to 449,207.76, 619,168.20 and 318,429.24

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Solution

The fourth proportional to 449,207.76, 619,168.20 and 318,429.24 is: 438,908.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,207.76 : 619,168.20 = 318,429.24 : x
  2. Step 2: Convert to fraction form
    449,207.76/619,168.20 = 318,429.24/x
  3. Step 3: Cross multiply
    449,207.76x = 619,168.20 × 318,429.24
  4. Step 4: Simplify right side
    449,207.76x = 197,161,259,358.17
  5. Step 5: Solve for x
    x = 197,161,259,358.17/449,207.76
  6. Step 6: Final answer
    x = 438,908.85

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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.