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Finding the Fourth Proportional to 652.25, 978.81 and 305.61

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Solution

The fourth proportional to 652.25, 978.81 and 305.61 is: 458.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.25 : 978.81 = 305.61 : x
  2. Step 2: Convert to fraction form
    652.25/978.81 = 305.61/x
  3. Step 3: Cross multiply
    652.25x = 978.81 × 305.61
  4. Step 4: Simplify right side
    652.25x = 299,134.12
  5. Step 5: Solve for x
    x = 299,134.12/652.25
  6. Step 6: Final answer
    x = 458.62

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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.