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Finding the Fourth Proportional to 426,566.32, 640,243.08 and 216,351.88

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Solution

The fourth proportional to 426,566.32, 640,243.08 and 216,351.88 is: 324,727.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,566.32 : 640,243.08 = 216,351.88 : x
  2. Step 2: Convert to fraction form
    426,566.32/640,243.08 = 216,351.88/x
  3. Step 3: Cross multiply
    426,566.32x = 640,243.08 × 216,351.88
  4. Step 4: Simplify right side
    426,566.32x = 138,517,794,014.99
  5. Step 5: Solve for x
    x = 138,517,794,014.99/426,566.32
  6. Step 6: Final answer
    x = 324,727.45

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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.