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Finding the Fourth Proportional to 312,544.55, 431,311.45 and 169,304.56

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Solution

The fourth proportional to 312,544.55, 431,311.45 and 169,304.56 is: 233,640.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,544.55 : 431,311.45 = 169,304.56 : x
  2. Step 2: Convert to fraction form
    312,544.55/431,311.45 = 169,304.56/x
  3. Step 3: Cross multiply
    312,544.55x = 431,311.45 × 169,304.56
  4. Step 4: Simplify right side
    312,544.55x = 73,022,995,265.21
  5. Step 5: Solve for x
    x = 73,022,995,265.21/312,544.55
  6. Step 6: Final answer
    x = 233,640.28

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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.