Home / 391,714,391.43-540,565,856.78-215,498,605.10

Finding the Fourth Proportional to 391,714,391.43, 540,565,856.78 and 215,498,605.10

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Solution

The fourth proportional to 391,714,391.43, 540,565,856.78 and 215,498,605.10 is: 297,388,073.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,714,391.43 : 540,565,856.78 = 215,498,605.10 : x
  2. Step 2: Convert to fraction form
    391,714,391.43/540,565,856.78 = 215,498,605.10/x
  3. Step 3: Cross multiply
    391,714,391.43x = 540,565,856.78 × 215,498,605.10
  4. Step 4: Simplify right side
    391,714,391.43x = 116,491,188,096,996,048
  5. Step 5: Solve for x
    x = 116,491,188,096,996,048/391,714,391.43
  6. Step 6: Final answer
    x = 297,388,073.16

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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.