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Finding the Fourth Proportional to 666,661.50, 1,000,096.13 and 217,278.11

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Solution

The fourth proportional to 666,661.50, 1,000,096.13 and 217,278.11 is: 325,951.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,661.50 : 1,000,096.13 = 217,278.11 : x
  2. Step 2: Convert to fraction form
    666,661.50/1,000,096.13 = 217,278.11/x
  3. Step 3: Cross multiply
    666,661.50x = 1,000,096.13 × 217,278.11
  4. Step 4: Simplify right side
    666,661.50x = 217,298,990,857.84
  5. Step 5: Solve for x
    x = 217,298,990,857.84/666,661.50
  6. Step 6: Final answer
    x = 325,951.01

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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.