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Finding the Fourth Proportional to 312,512.08, 431,265.88 and 169,272.48

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Solution

The fourth proportional to 312,512.08, 431,265.88 and 169,272.48 is: 233,595.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,512.08 : 431,265.88 = 169,272.48 : x
  2. Step 2: Convert to fraction form
    312,512.08/431,265.88 = 169,272.48/x
  3. Step 3: Cross multiply
    312,512.08x = 431,265.88 × 169,272.48
  4. Step 4: Simplify right side
    312,512.08x = 73,001,445,046.98
  5. Step 5: Solve for x
    x = 73,001,445,046.98/312,512.08
  6. Step 6: Final answer
    x = 233,595.59

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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.