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Finding the Fourth Proportional to 666,978.75, 1,000,627.47 and 217,700.37

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Solution

The fourth proportional to 666,978.75, 1,000,627.47 and 217,700.37 is: 326,602.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,978.75 : 1,000,627.47 = 217,700.37 : x
  2. Step 2: Convert to fraction form
    666,978.75/1,000,627.47 = 217,700.37/x
  3. Step 3: Cross multiply
    666,978.75x = 1,000,627.47 × 217,700.37
  4. Step 4: Simplify right side
    666,978.75x = 217,836,970,451.16
  5. Step 5: Solve for x
    x = 217,836,970,451.16/666,978.75
  6. Step 6: Final answer
    x = 326,602.56

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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.