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Finding the Fourth Proportional to 652.23, 978.36 and 515.13

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Solution

The fourth proportional to 652.23, 978.36 and 515.13 is: 772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.23 : 978.36 = 515.13 : x
  2. Step 2: Convert to fraction form
    652.23/978.36 = 515.13/x
  3. Step 3: Cross multiply
    652.23x = 978.36 × 515.13
  4. Step 4: Simplify right side
    652.23x = 503,982.59
  5. Step 5: Solve for x
    x = 503,982.59/652.23
  6. Step 6: Final answer
    x = 772.71

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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.