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Finding the Fourth Proportional to 312,805.80, 431,672.58 and 169,565.40

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Solution

The fourth proportional to 312,805.80, 431,672.58 and 169,565.40 is: 234,000.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,805.80 : 431,672.58 = 169,565.40 : x
  2. Step 2: Convert to fraction form
    312,805.80/431,672.58 = 169,565.40/x
  3. Step 3: Cross multiply
    312,805.80x = 431,672.58 × 169,565.40
  4. Step 4: Simplify right side
    312,805.80x = 73,196,733,696.73
  5. Step 5: Solve for x
    x = 73,196,733,696.73/312,805.80
  6. Step 6: Final answer
    x = 234,000.56

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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.