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Finding the Fourth Proportional to 272,417.80, 408,626.70 and 209,359.30

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Solution

The fourth proportional to 272,417.80, 408,626.70 and 209,359.30 is: 314,038.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,417.80 : 408,626.70 = 209,359.30 : x
  2. Step 2: Convert to fraction form
    272,417.80/408,626.70 = 209,359.30/x
  3. Step 3: Cross multiply
    272,417.80x = 408,626.70 × 209,359.30
  4. Step 4: Simplify right side
    272,417.80x = 85,549,799,873.31
  5. Step 5: Solve for x
    x = 85,549,799,873.31/272,417.80
  6. Step 6: Final answer
    x = 314,038.95

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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.