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Finding the Fourth Proportional to 666,452.61, 999,782.57 and 217,068.88

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Solution

The fourth proportional to 666,452.61, 999,782.57 and 217,068.88 is: 325,637.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,452.61 : 999,782.57 = 217,068.88 : x
  2. Step 2: Convert to fraction form
    666,452.61/999,782.57 = 217,068.88/x
  3. Step 3: Cross multiply
    666,452.61x = 999,782.57 × 217,068.88
  4. Step 4: Simplify right side
    666,452.61x = 217,021,682,713.42
  5. Step 5: Solve for x
    x = 217,021,682,713.42/666,452.61
  6. Step 6: Final answer
    x = 325,637.08

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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.