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Finding the Fourth Proportional to 315,951.05, 435,881.90 and 220,513.61

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Solution

The fourth proportional to 315,951.05, 435,881.90 and 220,513.61 is: 304,217.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,951.05 : 435,881.90 = 220,513.61 : x
  2. Step 2: Convert to fraction form
    315,951.05/435,881.90 = 220,513.61/x
  3. Step 3: Cross multiply
    315,951.05x = 435,881.90 × 220,513.61
  4. Step 4: Simplify right side
    315,951.05x = 96,117,888,020.68
  5. Step 5: Solve for x
    x = 96,117,888,020.68/315,951.05
  6. Step 6: Final answer
    x = 304,217.66

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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.