Home / 543,621.20-815,431.80-319,089.20

Finding the Fourth Proportional to 543,621.20, 815,431.80 and 319,089.20

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Solution

The fourth proportional to 543,621.20, 815,431.80 and 319,089.20 is: 478,633.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,621.20 : 815,431.80 = 319,089.20 : x
  2. Step 2: Convert to fraction form
    543,621.20/815,431.80 = 319,089.20/x
  3. Step 3: Cross multiply
    543,621.20x = 815,431.80 × 319,089.20
  4. Step 4: Simplify right side
    543,621.20x = 260,195,480,716.56
  5. Step 5: Solve for x
    x = 260,195,480,716.56/543,621.20
  6. Step 6: Final answer
    x = 478,633.80

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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.