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Finding the Fourth Proportional to 312,718.27, 431,551.23 and 169,478.27

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Solution

The fourth proportional to 312,718.27, 431,551.23 and 169,478.27 is: 233,880.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,718.27 : 431,551.23 = 169,478.27 : x
  2. Step 2: Convert to fraction form
    312,718.27/431,551.23 = 169,478.27/x
  3. Step 3: Cross multiply
    312,718.27x = 431,551.23 × 169,478.27
  4. Step 4: Simplify right side
    312,718.27x = 73,138,555,876.77
  5. Step 5: Solve for x
    x = 73,138,555,876.77/312,718.27
  6. Step 6: Final answer
    x = 233,880.02

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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.