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Finding the Fourth Proportional to 978,314.80, 1,467,472.20 and 268,414.60

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Solution

The fourth proportional to 978,314.80, 1,467,472.20 and 268,414.60 is: 402,621.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,314.80 : 1,467,472.20 = 268,414.60 : x
  2. Step 2: Convert to fraction form
    978,314.80/1,467,472.20 = 268,414.60/x
  3. Step 3: Cross multiply
    978,314.80x = 1,467,472.20 × 268,414.60
  4. Step 4: Simplify right side
    978,314.80x = 393,890,963,574.12
  5. Step 5: Solve for x
    x = 393,890,963,574.12/978,314.80
  6. Step 6: Final answer
    x = 402,621.90

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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.