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Finding the Fourth Proportional to 538,989.30, 808,370.55 and 272,499.30

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Solution

The fourth proportional to 538,989.30, 808,370.55 and 272,499.30 is: 408,691.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,989.30 : 808,370.55 = 272,499.30 : x
  2. Step 2: Convert to fraction form
    538,989.30/808,370.55 = 272,499.30/x
  3. Step 3: Cross multiply
    538,989.30x = 808,370.55 × 272,499.30
  4. Step 4: Simplify right side
    538,989.30x = 220,280,409,015.62
  5. Step 5: Solve for x
    x = 220,280,409,015.62/538,989.30
  6. Step 6: Final answer
    x = 408,691.62

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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.