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Finding the Fourth Proportional to 1,279,981.60, 1,915,306.80 and 1,168,007.20

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Solution

The fourth proportional to 1,279,981.60, 1,915,306.80 and 1,168,007.20 is: 1,747,753.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,981.60 : 1,915,306.80 = 1,168,007.20 : x
  2. Step 2: Convert to fraction form
    1,279,981.60/1,915,306.80 = 1,168,007.20/x
  3. Step 3: Cross multiply
    1,279,981.60x = 1,915,306.80 × 1,168,007.20
  4. Step 4: Simplify right side
    1,279,981.60x = 2,237,092,132,608.96
  5. Step 5: Solve for x
    x = 2,237,092,132,608.96/1,279,981.60
  6. Step 6: Final answer
    x = 1,747,753.35

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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.