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Finding the Fourth Proportional to 689.18, 1,033.05 and 524.20

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Solution

The fourth proportional to 689.18, 1,033.05 and 524.20 is: 785.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.18 : 1,033.05 = 524.20 : x
  2. Step 2: Convert to fraction form
    689.18/1,033.05 = 524.20/x
  3. Step 3: Cross multiply
    689.18x = 1,033.05 × 524.20
  4. Step 4: Simplify right side
    689.18x = 541,523.22
  5. Step 5: Solve for x
    x = 541,523.22/689.18
  6. Step 6: Final answer
    x = 785.75

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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.