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Finding the Fourth Proportional to 978,059.20, 1,467,088.80 and 268,086.10

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Solution

The fourth proportional to 978,059.20, 1,467,088.80 and 268,086.10 is: 402,129.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,059.20 : 1,467,088.80 = 268,086.10 : x
  2. Step 2: Convert to fraction form
    978,059.20/1,467,088.80 = 268,086.10/x
  3. Step 3: Cross multiply
    978,059.20x = 1,467,088.80 × 268,086.10
  4. Step 4: Simplify right side
    978,059.20x = 393,306,114,745.68
  5. Step 5: Solve for x
    x = 393,306,114,745.68/978,059.20
  6. Step 6: Final answer
    x = 402,129.15

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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.