Home / 391,955,512.90-540,894,315.44-215,739,740.74

Finding the Fourth Proportional to 391,955,512.90, 540,894,315.44 and 215,739,740.74

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Solution

The fourth proportional to 391,955,512.90, 540,894,315.44 and 215,739,740.74 is: 297,718,479.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,955,512.90 : 540,894,315.44 = 215,739,740.74 : x
  2. Step 2: Convert to fraction form
    391,955,512.90/540,894,315.44 = 215,739,740.74/x
  3. Step 3: Cross multiply
    391,955,512.90x = 540,894,315.44 × 215,739,740.74
  4. Step 4: Simplify right side
    391,955,512.90x = 116,692,399,380,765,392
  5. Step 5: Solve for x
    x = 116,692,399,380,765,392/391,955,512.90
  6. Step 6: Final answer
    x = 297,718,479.62

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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.