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Finding the Fourth Proportional to 660,374.92, 990,157.56 and 281,079.66

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Solution

The fourth proportional to 660,374.92, 990,157.56 and 281,079.66 is: 421,447.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,374.92 : 990,157.56 = 281,079.66 : x
  2. Step 2: Convert to fraction form
    660,374.92/990,157.56 = 281,079.66/x
  3. Step 3: Cross multiply
    660,374.92x = 990,157.56 × 281,079.66
  4. Step 4: Simplify right side
    660,374.92x = 278,313,150,311.23
  5. Step 5: Solve for x
    x = 278,313,150,311.23/660,374.92
  6. Step 6: Final answer
    x = 421,447.18

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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.