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Finding the Fourth Proportional to 312,881.76, 431,774.76 and 169,641.36

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Solution

The fourth proportional to 312,881.76, 431,774.76 and 169,641.36 is: 234,103.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,881.76 : 431,774.76 = 169,641.36 : x
  2. Step 2: Convert to fraction form
    312,881.76/431,774.76 = 169,641.36/x
  3. Step 3: Cross multiply
    312,881.76x = 431,774.76 × 169,641.36
  4. Step 4: Simplify right side
    312,881.76x = 73,246,857,500.07
  5. Step 5: Solve for x
    x = 73,246,857,500.07/312,881.76
  6. Step 6: Final answer
    x = 234,103.96

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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.