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Finding the Fourth Proportional to 312,479.36, 431,220.48 and 169,239.04

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Solution

The fourth proportional to 312,479.36, 431,220.48 and 169,239.04 is: 233,549.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,479.36 : 431,220.48 = 169,239.04 : x
  2. Step 2: Convert to fraction form
    312,479.36/431,220.48 = 169,239.04/x
  3. Step 3: Cross multiply
    312,479.36x = 431,220.48 × 169,239.04
  4. Step 4: Simplify right side
    312,479.36x = 72,979,340,063.54
  5. Step 5: Solve for x
    x = 72,979,340,063.54/312,479.36
  6. Step 6: Final answer
    x = 233,549.31

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Similar ratio
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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.