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Finding the Fourth Proportional to 652.14, 978.18 and 286.88

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Solution

The fourth proportional to 652.14, 978.18 and 286.88 is: 430.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.14 : 978.18 = 286.88 : x
  2. Step 2: Convert to fraction form
    652.14/978.18 = 286.88/x
  3. Step 3: Cross multiply
    652.14x = 978.18 × 286.88
  4. Step 4: Simplify right side
    652.14x = 280,615.39
  5. Step 5: Solve for x
    x = 280,615.39/652.14
  6. Step 6: Final answer
    x = 430.30

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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.