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Finding the Fourth Proportional to 652.63, 978.39 and 287.14

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Solution

The fourth proportional to 652.63, 978.39 and 287.14 is: 430.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.63 : 978.39 = 287.14 : x
  2. Step 2: Convert to fraction form
    652.63/978.39 = 287.14/x
  3. Step 3: Cross multiply
    652.63x = 978.39 × 287.14
  4. Step 4: Simplify right side
    652.63x = 280,934.90
  5. Step 5: Solve for x
    x = 280,934.90/652.63
  6. Step 6: Final answer
    x = 430.47

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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.