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Finding the Fourth Proportional to 660,373.92, 990,156.06 and 281,078.66

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Solution

The fourth proportional to 660,373.92, 990,156.06 and 281,078.66 is: 421,445.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,373.92 : 990,156.06 = 281,078.66 : x
  2. Step 2: Convert to fraction form
    660,373.92/990,156.06 = 281,078.66/x
  3. Step 3: Cross multiply
    660,373.92x = 990,156.06 × 281,078.66
  4. Step 4: Simplify right side
    660,373.92x = 278,311,733,584.90
  5. Step 5: Solve for x
    x = 278,311,733,584.90/660,373.92
  6. Step 6: Final answer
    x = 421,445.68

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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.