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Finding the Fourth Proportional to 312,813.52, 431,685.74 and 169,573.26

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Solution

The fourth proportional to 312,813.52, 431,685.74 and 169,573.26 is: 234,012.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,813.52 : 431,685.74 = 169,573.26 : x
  2. Step 2: Convert to fraction form
    312,813.52/431,685.74 = 169,573.26/x
  3. Step 3: Cross multiply
    312,813.52x = 431,685.74 × 169,573.26
  4. Step 4: Simplify right side
    312,813.52x = 73,202,358,227.31
  5. Step 5: Solve for x
    x = 73,202,358,227.31/312,813.52
  6. Step 6: Final answer
    x = 234,012.77

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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.