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Finding the Fourth Proportional to 978,028.20, 1,467,042.30 and 660,767.40

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Solution

The fourth proportional to 978,028.20, 1,467,042.30 and 660,767.40 is: 991,151.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,028.20 : 1,467,042.30 = 660,767.40 : x
  2. Step 2: Convert to fraction form
    978,028.20/1,467,042.30 = 660,767.40/x
  3. Step 3: Cross multiply
    978,028.20x = 1,467,042.30 × 660,767.40
  4. Step 4: Simplify right side
    978,028.20x = 969,373,726,261.02
  5. Step 5: Solve for x
    x = 969,373,726,261.02/978,028.20
  6. Step 6: Final answer
    x = 991,151.10

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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.