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Finding the Fourth Proportional to 978,138.20, 1,467,207.30 and 268,165.10

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Solution

The fourth proportional to 978,138.20, 1,467,207.30 and 268,165.10 is: 402,247.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,138.20 : 1,467,207.30 = 268,165.10 : x
  2. Step 2: Convert to fraction form
    978,138.20/1,467,207.30 = 268,165.10/x
  3. Step 3: Cross multiply
    978,138.20x = 1,467,207.30 × 268,165.10
  4. Step 4: Simplify right side
    978,138.20x = 393,453,792,325.23
  5. Step 5: Solve for x
    x = 393,453,792,325.23/978,138.20
  6. Step 6: Final answer
    x = 402,247.65

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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.