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Finding the Fourth Proportional to 386,701.41, 533,651.59 and 216,939.18

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Solution

The fourth proportional to 386,701.41, 533,651.59 and 216,939.18 is: 299,378.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,701.41 : 533,651.59 = 216,939.18 : x
  2. Step 2: Convert to fraction form
    386,701.41/533,651.59 = 216,939.18/x
  3. Step 3: Cross multiply
    386,701.41x = 533,651.59 × 216,939.18
  4. Step 4: Simplify right side
    386,701.41x = 115,769,937,797.95
  5. Step 5: Solve for x
    x = 115,769,937,797.95/386,701.41
  6. Step 6: Final answer
    x = 299,378.11

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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.