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Finding the Fourth Proportional to 312,511.33, 431,265.76 and 169,270.93

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Solution

The fourth proportional to 312,511.33, 431,265.76 and 169,270.93 is: 233,593.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,511.33 : 431,265.76 = 169,270.93 : x
  2. Step 2: Convert to fraction form
    312,511.33/431,265.76 = 169,270.93/x
  3. Step 3: Cross multiply
    312,511.33x = 431,265.76 × 169,270.93
  4. Step 4: Simplify right side
    312,511.33x = 73,000,757,773.70
  5. Step 5: Solve for x
    x = 73,000,757,773.70/312,511.33
  6. Step 6: Final answer
    x = 233,593.95

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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.