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Finding the Fourth Proportional to 386,091.28, 532,805.61 and 216,326.62

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Solution

The fourth proportional to 386,091.28, 532,805.61 and 216,326.62 is: 298,530.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,091.28 : 532,805.61 = 216,326.62 : x
  2. Step 2: Convert to fraction form
    386,091.28/532,805.61 = 216,326.62/x
  3. Step 3: Cross multiply
    386,091.28x = 532,805.61 × 216,326.62
  4. Step 4: Simplify right side
    386,091.28x = 115,260,036,728.34
  5. Step 5: Solve for x
    x = 115,260,036,728.34/386,091.28
  6. Step 6: Final answer
    x = 298,530.54

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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.