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Finding the Fourth Proportional to 681.60, 1,021.32 and 527.90

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Solution

The fourth proportional to 681.60, 1,021.32 and 527.90 is: 791.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.60 : 1,021.32 = 527.90 : x
  2. Step 2: Convert to fraction form
    681.60/1,021.32 = 527.90/x
  3. Step 3: Cross multiply
    681.60x = 1,021.32 × 527.90
  4. Step 4: Simplify right side
    681.60x = 539,154.83
  5. Step 5: Solve for x
    x = 539,154.83/681.60
  6. Step 6: Final answer
    x = 791.01

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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.