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Finding the Fourth Proportional to 312,319.89, 431,000.96 and 169,079.89

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Solution

The fourth proportional to 312,319.89, 431,000.96 and 169,079.89 is: 233,329.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,319.89 : 431,000.96 = 169,079.89 : x
  2. Step 2: Convert to fraction form
    312,319.89/431,000.96 = 169,079.89/x
  3. Step 3: Cross multiply
    312,319.89x = 431,000.96 × 169,079.89
  4. Step 4: Simplify right side
    312,319.89x = 72,873,594,906.69
  5. Step 5: Solve for x
    x = 72,873,594,906.69/312,319.89
  6. Step 6: Final answer
    x = 233,329.98

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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.