Home / 391,536,880.34-540,310,102.97-215,324,871.44

Finding the Fourth Proportional to 391,536,880.34, 540,310,102.97 and 215,324,871.44

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Solution

The fourth proportional to 391,536,880.34, 540,310,102.97 and 215,324,871.44 is: 297,142,387.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,536,880.34 : 540,310,102.97 = 215,324,871.44 : x
  2. Step 2: Convert to fraction form
    391,536,880.34/540,310,102.97 = 215,324,871.44/x
  3. Step 3: Cross multiply
    391,536,880.34x = 540,310,102.97 × 215,324,871.44
  4. Step 4: Simplify right side
    391,536,880.34x = 116,342,203,455,970,240
  5. Step 5: Solve for x
    x = 116,342,203,455,970,240/391,536,880.34
  6. Step 6: Final answer
    x = 297,142,387.60

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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.