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Finding the Fourth Proportional to 666,859.14, 1,000,392.89 and 217,475.49

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Solution

The fourth proportional to 666,859.14, 1,000,392.89 and 217,475.49 is: 326,247.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,859.14 : 1,000,392.89 = 217,475.49 : x
  2. Step 2: Convert to fraction form
    666,859.14/1,000,392.89 = 217,475.49/x
  3. Step 3: Cross multiply
    666,859.14x = 1,000,392.89 × 217,475.49
  4. Step 4: Simplify right side
    666,859.14x = 217,560,931,838.47
  5. Step 5: Solve for x
    x = 217,560,931,838.47/666,859.14
  6. Step 6: Final answer
    x = 326,247.21

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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.