Home / 391,020.48-539,572.32-221,227.20

Finding the Fourth Proportional to 391,020.48, 539,572.32 and 221,227.20

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Solution

The fourth proportional to 391,020.48, 539,572.32 and 221,227.20 is: 305,273.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,020.48 : 539,572.32 = 221,227.20 : x
  2. Step 2: Convert to fraction form
    391,020.48/539,572.32 = 221,227.20/x
  3. Step 3: Cross multiply
    391,020.48x = 539,572.32 × 221,227.20
  4. Step 4: Simplify right side
    391,020.48x = 119,368,073,551.10
  5. Step 5: Solve for x
    x = 119,368,073,551.10/391,020.48
  6. Step 6: Final answer
    x = 305,273.20

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1.5x scale

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.