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Finding the Fourth Proportional to 326,867.76, 489,858.72 and 169,206.90

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Solution

The fourth proportional to 326,867.76, 489,858.72 and 169,206.90 is: 253,581.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,867.76 : 489,858.72 = 169,206.90 : x
  2. Step 2: Convert to fraction form
    326,867.76/489,858.72 = 169,206.90/x
  3. Step 3: Cross multiply
    326,867.76x = 489,858.72 × 169,206.90
  4. Step 4: Simplify right side
    326,867.76x = 82,887,475,449.17
  5. Step 5: Solve for x
    x = 82,887,475,449.17/326,867.76
  6. Step 6: Final answer
    x = 253,581.07

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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.