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Finding the Fourth Proportional to 343,642.40, 515,512.20 and 106,960.40

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Solution

The fourth proportional to 343,642.40, 515,512.20 and 106,960.40 is: 160,455.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,642.40 : 515,512.20 = 106,960.40 : x
  2. Step 2: Convert to fraction form
    343,642.40/515,512.20 = 106,960.40/x
  3. Step 3: Cross multiply
    343,642.40x = 515,512.20 × 106,960.40
  4. Step 4: Simplify right side
    343,642.40x = 55,139,391,116.88
  5. Step 5: Solve for x
    x = 55,139,391,116.88/343,642.40
  6. Step 6: Final answer
    x = 160,455.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.