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Finding the Fourth Proportional to 347,689.80, 521,534.70 and 268,860.60

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Solution

The fourth proportional to 347,689.80, 521,534.70 and 268,860.60 is: 403,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,689.80 : 521,534.70 = 268,860.60 : x
  2. Step 2: Convert to fraction form
    347,689.80/521,534.70 = 268,860.60/x
  3. Step 3: Cross multiply
    347,689.80x = 521,534.70 × 268,860.60
  4. Step 4: Simplify right side
    347,689.80x = 140,220,132,362.82
  5. Step 5: Solve for x
    x = 140,220,132,362.82/347,689.80
  6. Step 6: Final answer
    x = 403,290.90

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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.