Home / 391,215.48-539,890.22-221,445.96

Finding the Fourth Proportional to 391,215.48, 539,890.22 and 221,445.96

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Solution

The fourth proportional to 391,215.48, 539,890.22 and 221,445.96 is: 305,602.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,215.48 : 539,890.22 = 221,445.96 : x
  2. Step 2: Convert to fraction form
    391,215.48/539,890.22 = 221,445.96/x
  3. Step 3: Cross multiply
    391,215.48x = 539,890.22 × 221,445.96
  4. Step 4: Simplify right side
    391,215.48x = 119,556,508,062.51
  5. Step 5: Solve for x
    x = 119,556,508,062.51/391,215.48
  6. Step 6: Final answer
    x = 305,602.70

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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.