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Finding the Fourth Proportional to 287,593.80, 431,390.70 and 267,910.80

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Solution

The fourth proportional to 287,593.80, 431,390.70 and 267,910.80 is: 401,866.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,593.80 : 431,390.70 = 267,910.80 : x
  2. Step 2: Convert to fraction form
    287,593.80/431,390.70 = 267,910.80/x
  3. Step 3: Cross multiply
    287,593.80x = 431,390.70 × 267,910.80
  4. Step 4: Simplify right side
    287,593.80x = 115,574,227,549.56
  5. Step 5: Solve for x
    x = 115,574,227,549.56/287,593.80
  6. Step 6: Final answer
    x = 401,866.20

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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.