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Finding the Fourth Proportional to 312,808.80, 431,676.72 and 169,568.40

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Solution

The fourth proportional to 312,808.80, 431,676.72 and 169,568.40 is: 234,004.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,808.80 : 431,676.72 = 169,568.40 : x
  2. Step 2: Convert to fraction form
    312,808.80/431,676.72 = 169,568.40/x
  3. Step 3: Cross multiply
    312,808.80x = 431,676.72 × 169,568.40
  4. Step 4: Simplify right side
    312,808.80x = 73,198,730,727.65
  5. Step 5: Solve for x
    x = 73,198,730,727.65/312,808.80
  6. Step 6: Final answer
    x = 234,004.70

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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.