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Finding the Fourth Proportional to 666,257.84, 999,456.76 and 217,013.72

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Solution

The fourth proportional to 666,257.84, 999,456.76 and 217,013.72 is: 325,543.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,257.84 : 999,456.76 = 217,013.72 : x
  2. Step 2: Convert to fraction form
    666,257.84/999,456.76 = 217,013.72/x
  3. Step 3: Cross multiply
    666,257.84x = 999,456.76 × 217,013.72
  4. Step 4: Simplify right side
    666,257.84x = 216,895,829,466.75
  5. Step 5: Solve for x
    x = 216,895,829,466.75/666,257.84
  6. Step 6: Final answer
    x = 325,543.38

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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.