Home / 391,498,408.16-540,270,613.78-212,881,016.54

Finding the Fourth Proportional to 391,498,408.16, 540,270,613.78 and 212,881,016.54

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Solution

The fourth proportional to 391,498,408.16, 540,270,613.78 and 212,881,016.54 is: 293,777,331.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,498,408.16 : 540,270,613.78 = 212,881,016.54 : x
  2. Step 2: Convert to fraction form
    391,498,408.16/540,270,613.78 = 212,881,016.54/x
  3. Step 3: Cross multiply
    391,498,408.16x = 540,270,613.78 × 212,881,016.54
  4. Step 4: Simplify right side
    391,498,408.16x = 115,013,357,468,176,128
  5. Step 5: Solve for x
    x = 115,013,357,468,176,128/391,498,408.16
  6. Step 6: Final answer
    x = 293,777,331.07

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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.