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Finding the Fourth Proportional to 311,958.74, 430,503.05 and 168,718.78

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Solution

The fourth proportional to 311,958.74, 430,503.05 and 168,718.78 is: 232,831.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,958.74 : 430,503.05 = 168,718.78 : x
  2. Step 2: Convert to fraction form
    311,958.74/430,503.05 = 168,718.78/x
  3. Step 3: Cross multiply
    311,958.74x = 430,503.05 × 168,718.78
  4. Step 4: Simplify right side
    311,958.74x = 72,633,949,382.28
  5. Step 5: Solve for x
    x = 72,633,949,382.28/311,958.74
  6. Step 6: Final answer
    x = 232,831.91

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1.5x scale

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.