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Finding the Fourth Proportional to 386,090.34, 579,147.71 and 133,385.22

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Solution

The fourth proportional to 386,090.34, 579,147.71 and 133,385.22 is: 200,082.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,090.34 : 579,147.71 = 133,385.22 : x
  2. Step 2: Convert to fraction form
    386,090.34/579,147.71 = 133,385.22/x
  3. Step 3: Cross multiply
    386,090.34x = 579,147.71 × 133,385.22
  4. Step 4: Simplify right side
    386,090.34x = 77,249,744,043.92
  5. Step 5: Solve for x
    x = 77,249,744,043.92/386,090.34
  6. Step 6: Final answer
    x = 200,082.04

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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.