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Finding the Fourth Proportional to 315,131.76, 435,042.36 and 243,350.64

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Solution

The fourth proportional to 315,131.76, 435,042.36 and 243,350.64 is: 335,947.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,131.76 : 435,042.36 = 243,350.64 : x
  2. Step 2: Convert to fraction form
    315,131.76/435,042.36 = 243,350.64/x
  3. Step 3: Cross multiply
    315,131.76x = 435,042.36 × 243,350.64
  4. Step 4: Simplify right side
    315,131.76x = 105,867,836,733.11
  5. Step 5: Solve for x
    x = 105,867,836,733.11/315,131.76
  6. Step 6: Final answer
    x = 335,947.85

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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.