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Finding the Fourth Proportional to 686.52, 1,029.78 and 302.04

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Solution

The fourth proportional to 686.52, 1,029.78 and 302.04 is: 453.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.52 : 1,029.78 = 302.04 : x
  2. Step 2: Convert to fraction form
    686.52/1,029.78 = 302.04/x
  3. Step 3: Cross multiply
    686.52x = 1,029.78 × 302.04
  4. Step 4: Simplify right side
    686.52x = 311,034.75
  5. Step 5: Solve for x
    x = 311,034.75/686.52
  6. Step 6: Final answer
    x = 453.06

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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.