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Finding the Fourth Proportional to 818.80, 1,129.95 and 524.57

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Solution

The fourth proportional to 818.80, 1,129.95 and 524.57 is: 723.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.80 : 1,129.95 = 524.57 : x
  2. Step 2: Convert to fraction form
    818.80/1,129.95 = 524.57/x
  3. Step 3: Cross multiply
    818.80x = 1,129.95 × 524.57
  4. Step 4: Simplify right side
    818.80x = 592,732.22
  5. Step 5: Solve for x
    x = 592,732.22/818.80
  6. Step 6: Final answer
    x = 723.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.