Home / 391,955,514.40-540,894,317.52-215,739,742.24

Finding the Fourth Proportional to 391,955,514.40, 540,894,317.52 and 215,739,742.24

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Solution

The fourth proportional to 391,955,514.40, 540,894,317.52 and 215,739,742.24 is: 297,718,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,955,514.40 : 540,894,317.52 = 215,739,742.24 : x
  2. Step 2: Convert to fraction form
    391,955,514.40/540,894,317.52 = 215,739,742.24/x
  3. Step 3: Cross multiply
    391,955,514.40x = 540,894,317.52 × 215,739,742.24
  4. Step 4: Simplify right side
    391,955,514.40x = 116,692,400,640,845,520
  5. Step 5: Solve for x
    x = 116,692,400,640,845,520/391,955,514.40
  6. Step 6: Final answer
    x = 297,718,481.70

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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.