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Finding the Fourth Proportional to 709.06, 1,062.78 and 362.20

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Solution

The fourth proportional to 709.06, 1,062.78 and 362.20 is: 542.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.06 : 1,062.78 = 362.20 : x
  2. Step 2: Convert to fraction form
    709.06/1,062.78 = 362.20/x
  3. Step 3: Cross multiply
    709.06x = 1,062.78 × 362.20
  4. Step 4: Simplify right side
    709.06x = 384,938.92
  5. Step 5: Solve for x
    x = 384,938.92/709.06
  6. Step 6: Final answer
    x = 542.89

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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.