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Finding the Fourth Proportional to 652.95, 978.87 and 378.71

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Solution

The fourth proportional to 652.95, 978.87 and 378.71 is: 567.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.95 : 978.87 = 378.71 : x
  2. Step 2: Convert to fraction form
    652.95/978.87 = 378.71/x
  3. Step 3: Cross multiply
    652.95x = 978.87 × 378.71
  4. Step 4: Simplify right side
    652.95x = 370,707.86
  5. Step 5: Solve for x
    x = 370,707.86/652.95
  6. Step 6: Final answer
    x = 567.74

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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.