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Finding the Fourth Proportional to 660,153, 990,356.76 and 281,066.70

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Solution

The fourth proportional to 660,153, 990,356.76 and 281,066.70 is: 421,654.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,153 : 990,356.76 = 281,066.70 : x
  2. Step 2: Convert to fraction form
    660,153/990,356.76 = 281,066.70/x
  3. Step 3: Cross multiply
    660,153x = 990,356.76 × 281,066.70
  4. Step 4: Simplify right side
    660,153x = 278,356,306,355.89
  5. Step 5: Solve for x
    x = 278,356,306,355.89/660,153
  6. Step 6: Final answer
    x = 421,654.23

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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.