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Finding the Fourth Proportional to 386,305.67, 533,100.15 and 216,539.80

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Solution

The fourth proportional to 386,305.67, 533,100.15 and 216,539.80 is: 298,823.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,305.67 : 533,100.15 = 216,539.80 : x
  2. Step 2: Convert to fraction form
    386,305.67/533,100.15 = 216,539.80/x
  3. Step 3: Cross multiply
    386,305.67x = 533,100.15 × 216,539.80
  4. Step 4: Simplify right side
    386,305.67x = 115,437,398,528.22
  5. Step 5: Solve for x
    x = 115,437,398,528.22/386,305.67
  6. Step 6: Final answer
    x = 298,823.98

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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.