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Finding the Fourth Proportional to 683.52, 1,029.85 and 618.59

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Solution

The fourth proportional to 683.52, 1,029.85 and 618.59 is: 932.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.52 : 1,029.85 = 618.59 : x
  2. Step 2: Convert to fraction form
    683.52/1,029.85 = 618.59/x
  3. Step 3: Cross multiply
    683.52x = 1,029.85 × 618.59
  4. Step 4: Simplify right side
    683.52x = 637,054.91
  5. Step 5: Solve for x
    x = 637,054.91/683.52
  6. Step 6: Final answer
    x = 932.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.