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Finding the Fourth Proportional to 318,988.80, 478,541.52 and 132,014.88

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Solution

The fourth proportional to 318,988.80, 478,541.52 and 132,014.88 is: 198,046.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,988.80 : 478,541.52 = 132,014.88 : x
  2. Step 2: Convert to fraction form
    318,988.80/478,541.52 = 132,014.88/x
  3. Step 3: Cross multiply
    318,988.80x = 478,541.52 × 132,014.88
  4. Step 4: Simplify right side
    318,988.80x = 63,174,601,337.82
  5. Step 5: Solve for x
    x = 63,174,601,337.82/318,988.80
  6. Step 6: Final answer
    x = 198,046.46

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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.