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Finding the Fourth Proportional to 343,645.40, 515,516.70 and 106,963.40

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Solution

The fourth proportional to 343,645.40, 515,516.70 and 106,963.40 is: 160,460.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,645.40 : 515,516.70 = 106,963.40 : x
  2. Step 2: Convert to fraction form
    343,645.40/515,516.70 = 106,963.40/x
  3. Step 3: Cross multiply
    343,645.40x = 515,516.70 × 106,963.40
  4. Step 4: Simplify right side
    343,645.40x = 55,141,418,988.78
  5. Step 5: Solve for x
    x = 55,141,418,988.78/343,645.40
  6. Step 6: Final answer
    x = 160,460.23

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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.