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Finding the Fourth Proportional to 312,486.20, 431,230.80 and 169,246.22

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Solution

The fourth proportional to 312,486.20, 431,230.80 and 169,246.22 is: 233,559.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,486.20 : 431,230.80 = 169,246.22 : x
  2. Step 2: Convert to fraction form
    312,486.20/431,230.80 = 169,246.22/x
  3. Step 3: Cross multiply
    312,486.20x = 431,230.80 × 169,246.22
  4. Step 4: Simplify right side
    312,486.20x = 72,984,182,847.58
  5. Step 5: Solve for x
    x = 72,984,182,847.58/312,486.20
  6. Step 6: Final answer
    x = 233,559.70

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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.