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Finding the Fourth Proportional to 312,628.01, 431,423.82 and 169,387.61

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Solution

The fourth proportional to 312,628.01, 431,423.82 and 169,387.61 is: 233,753.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,628.01 : 431,423.82 = 169,387.61 : x
  2. Step 2: Convert to fraction form
    312,628.01/431,423.82 = 169,387.61/x
  3. Step 3: Cross multiply
    312,628.01x = 431,423.82 × 169,387.61
  4. Step 4: Simplify right side
    312,628.01x = 73,077,847,609.75
  5. Step 5: Solve for x
    x = 73,077,847,609.75/312,628.01
  6. Step 6: Final answer
    x = 233,753.36

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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.