Home / 1,853.31-2,780.20-621.61

Finding the Fourth Proportional to 1,853.31, 2,780.20 and 621.61

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Solution

The fourth proportional to 1,853.31, 2,780.20 and 621.61 is: 932.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,853.31 : 2,780.20 = 621.61 : x
  2. Step 2: Convert to fraction form
    1,853.31/2,780.20 = 621.61/x
  3. Step 3: Cross multiply
    1,853.31x = 2,780.20 × 621.61
  4. Step 4: Simplify right side
    1,853.31x = 1,728,200.12
  5. Step 5: Solve for x
    x = 1,728,200.12/1,853.31
  6. Step 6: Final answer
    x = 932.49

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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.