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Finding the Fourth Proportional to 978.60, 1,468.14 and 546.06

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Solution

The fourth proportional to 978.60, 1,468.14 and 546.06 is: 819.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.60 : 1,468.14 = 546.06 : x
  2. Step 2: Convert to fraction form
    978.60/1,468.14 = 546.06/x
  3. Step 3: Cross multiply
    978.60x = 1,468.14 × 546.06
  4. Step 4: Simplify right side
    978.60x = 801,692.53
  5. Step 5: Solve for x
    x = 801,692.53/978.60
  6. Step 6: Final answer
    x = 819.22

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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.