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Finding the Fourth Proportional to 312,441.60, 431,164.08 and 169,200.48

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Solution

The fourth proportional to 312,441.60, 431,164.08 and 169,200.48 is: 233,493.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,441.60 : 431,164.08 = 169,200.48 : x
  2. Step 2: Convert to fraction form
    312,441.60/431,164.08 = 169,200.48/x
  3. Step 3: Cross multiply
    312,441.60x = 431,164.08 × 169,200.48
  4. Step 4: Simplify right side
    312,441.60x = 72,953,169,294.76
  5. Step 5: Solve for x
    x = 72,953,169,294.76/312,441.60
  6. Step 6: Final answer
    x = 233,493.78

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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.