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Finding the Fourth Proportional to 652.70, 978.48 and 379.02

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Solution

The fourth proportional to 652.70, 978.48 and 379.02 is: 568.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.70 : 978.48 = 379.02 : x
  2. Step 2: Convert to fraction form
    652.70/978.48 = 379.02/x
  3. Step 3: Cross multiply
    652.70x = 978.48 × 379.02
  4. Step 4: Simplify right side
    652.70x = 370,863.49
  5. Step 5: Solve for x
    x = 370,863.49/652.70
  6. Step 6: Final answer
    x = 568.20

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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.