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Finding the Fourth Proportional to 399,142.66, 598,809.68 and 132,905.58

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Solution

The fourth proportional to 399,142.66, 598,809.68 and 132,905.58 is: 199,390.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,142.66 : 598,809.68 = 132,905.58 : x
  2. Step 2: Convert to fraction form
    399,142.66/598,809.68 = 132,905.58/x
  3. Step 3: Cross multiply
    399,142.66x = 598,809.68 × 132,905.58
  4. Step 4: Simplify right side
    399,142.66x = 79,585,147,830.01
  5. Step 5: Solve for x
    x = 79,585,147,830.01/399,142.66
  6. Step 6: Final answer
    x = 199,390.23

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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.