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Finding the Fourth Proportional to 666,862.88, 1,000,398.51 and 217,479.24

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Solution

The fourth proportional to 666,862.88, 1,000,398.51 and 217,479.24 is: 326,252.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,862.88 : 1,000,398.51 = 217,479.24 : x
  2. Step 2: Convert to fraction form
    666,862.88/1,000,398.51 = 217,479.24/x
  3. Step 3: Cross multiply
    666,862.88x = 1,000,398.51 × 217,479.24
  4. Step 4: Simplify right side
    666,862.88x = 217,565,907,651.93
  5. Step 5: Solve for x
    x = 217,565,907,651.93/666,862.88
  6. Step 6: Final answer
    x = 326,252.84

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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.