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Finding the Fourth Proportional to 978,218.70, 1,466,781.30 and 498,146.28

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Solution

The fourth proportional to 978,218.70, 1,466,781.30 and 498,146.28 is: 746,940.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,218.70 : 1,466,781.30 = 498,146.28 : x
  2. Step 2: Convert to fraction form
    978,218.70/1,466,781.30 = 498,146.28/x
  3. Step 3: Cross multiply
    978,218.70x = 1,466,781.30 × 498,146.28
  4. Step 4: Simplify right side
    978,218.70x = 730,671,648,168.56
  5. Step 5: Solve for x
    x = 730,671,648,168.56/978,218.70
  6. Step 6: Final answer
    x = 746,940.99

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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.