Home / 356,279.16-491,543.20-203,206.78

Finding the Fourth Proportional to 356,279.16, 491,543.20 and 203,206.78

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Solution

The fourth proportional to 356,279.16, 491,543.20 and 203,206.78 is: 280,355.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,279.16 : 491,543.20 = 203,206.78 : x
  2. Step 2: Convert to fraction form
    356,279.16/491,543.20 = 203,206.78/x
  3. Step 3: Cross multiply
    356,279.16x = 491,543.20 × 203,206.78
  4. Step 4: Simplify right side
    356,279.16x = 99,884,910,902.90
  5. Step 5: Solve for x
    x = 99,884,910,902.90/356,279.16
  6. Step 6: Final answer
    x = 280,355.75

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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.