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Finding the Fourth Proportional to 978.44, 1,468.06 and 717.62

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Solution

The fourth proportional to 978.44, 1,468.06 and 717.62 is: 1,076.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.44 : 1,468.06 = 717.62 : x
  2. Step 2: Convert to fraction form
    978.44/1,468.06 = 717.62/x
  3. Step 3: Cross multiply
    978.44x = 1,468.06 × 717.62
  4. Step 4: Simplify right side
    978.44x = 1,053,509.22
  5. Step 5: Solve for x
    x = 1,053,509.22/978.44
  6. Step 6: Final answer
    x = 1,076.72

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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.