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Finding the Fourth Proportional to 666,871.14, 1,000,410.90 and 217,487.46

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Solution

The fourth proportional to 666,871.14, 1,000,410.90 and 217,487.46 is: 326,265.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,871.14 : 1,000,410.90 = 217,487.46 : x
  2. Step 2: Convert to fraction form
    666,871.14/1,000,410.90 = 217,487.46/x
  3. Step 3: Cross multiply
    666,871.14x = 1,000,410.90 × 217,487.46
  4. Step 4: Simplify right side
    666,871.14x = 217,576,825,597.31
  5. Step 5: Solve for x
    x = 217,576,825,597.31/666,871.14
  6. Step 6: Final answer
    x = 326,265.17

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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.