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Finding the Fourth Proportional to 686.86, 1,029.48 and 362.06

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Solution

The fourth proportional to 686.86, 1,029.48 and 362.06 is: 542.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.86 : 1,029.48 = 362.06 : x
  2. Step 2: Convert to fraction form
    686.86/1,029.48 = 362.06/x
  3. Step 3: Cross multiply
    686.86x = 1,029.48 × 362.06
  4. Step 4: Simplify right side
    686.86x = 372,733.53
  5. Step 5: Solve for x
    x = 372,733.53/686.86
  6. Step 6: Final answer
    x = 542.66

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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.