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Finding the Fourth Proportional to 312,743.52, 431,575.56 and 185,343.48

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Solution

The fourth proportional to 312,743.52, 431,575.56 and 185,343.48 is: 255,767.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,743.52 : 431,575.56 = 185,343.48 : x
  2. Step 2: Convert to fraction form
    312,743.52/431,575.56 = 185,343.48/x
  3. Step 3: Cross multiply
    312,743.52x = 431,575.56 × 185,343.48
  4. Step 4: Simplify right side
    312,743.52x = 79,989,716,173.35
  5. Step 5: Solve for x
    x = 79,989,716,173.35/312,743.52
  6. Step 6: Final answer
    x = 255,767.78

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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.