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Finding the Fourth Proportional to 312,615.68, 431,410.05 and 169,375.61

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Solution

The fourth proportional to 312,615.68, 431,410.05 and 169,375.61 is: 233,738.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,615.68 : 431,410.05 = 169,375.61 : x
  2. Step 2: Convert to fraction form
    312,615.68/431,410.05 = 169,375.61/x
  3. Step 3: Cross multiply
    312,615.68x = 431,410.05 × 169,375.61
  4. Step 4: Simplify right side
    312,615.68x = 73,070,341,457.41
  5. Step 5: Solve for x
    x = 73,070,341,457.41/312,615.68
  6. Step 6: Final answer
    x = 233,738.57

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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.