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Finding the Fourth Proportional to 543,231.20, 814,846.80 and 431,256.80

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Solution

The fourth proportional to 543,231.20, 814,846.80 and 431,256.80 is: 646,885.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,231.20 : 814,846.80 = 431,256.80 : x
  2. Step 2: Convert to fraction form
    543,231.20/814,846.80 = 431,256.80/x
  3. Step 3: Cross multiply
    543,231.20x = 814,846.80 × 431,256.80
  4. Step 4: Simplify right side
    543,231.20x = 351,408,223,458.24
  5. Step 5: Solve for x
    x = 351,408,223,458.24/543,231.20
  6. Step 6: Final answer
    x = 646,885.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.