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Finding the Fourth Proportional to 386,221.16, 532,955.88 and 216,422.48

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Solution

The fourth proportional to 386,221.16, 532,955.88 and 216,422.48 is: 298,646.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,221.16 : 532,955.88 = 216,422.48 : x
  2. Step 2: Convert to fraction form
    386,221.16/532,955.88 = 216,422.48/x
  3. Step 3: Cross multiply
    386,221.16x = 532,955.88 × 216,422.48
  4. Step 4: Simplify right side
    386,221.16x = 115,343,633,280.18
  5. Step 5: Solve for x
    x = 115,343,633,280.18/386,221.16
  6. Step 6: Final answer
    x = 298,646.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.