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Finding the Fourth Proportional to 272,387.80, 408,581.70 and 209,329.30

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Solution

The fourth proportional to 272,387.80, 408,581.70 and 209,329.30 is: 313,993.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,387.80 : 408,581.70 = 209,329.30 : x
  2. Step 2: Convert to fraction form
    272,387.80/408,581.70 = 209,329.30/x
  3. Step 3: Cross multiply
    272,387.80x = 408,581.70 × 209,329.30
  4. Step 4: Simplify right side
    272,387.80x = 85,528,121,253.81
  5. Step 5: Solve for x
    x = 85,528,121,253.81/272,387.80
  6. Step 6: Final answer
    x = 313,993.95

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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.