Home / 811,815.20-1,217,799.60-220,839.20

Finding the Fourth Proportional to 811,815.20, 1,217,799.60 and 220,839.20

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Solution

The fourth proportional to 811,815.20, 1,217,799.60 and 220,839.20 is: 331,279.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,815.20 : 1,217,799.60 = 220,839.20 : x
  2. Step 2: Convert to fraction form
    811,815.20/1,217,799.60 = 220,839.20/x
  3. Step 3: Cross multiply
    811,815.20x = 1,217,799.60 × 220,839.20
  4. Step 4: Simplify right side
    811,815.20x = 268,937,889,424.32
  5. Step 5: Solve for x
    x = 268,937,889,424.32/811,815.20
  6. Step 6: Final answer
    x = 331,279.69

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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.