Home / 1,856.30-2,780.40-814.91

Finding the Fourth Proportional to 1,856.30, 2,780.40 and 814.91

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Solution

The fourth proportional to 1,856.30, 2,780.40 and 814.91 is: 1,220.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.30 : 2,780.40 = 814.91 : x
  2. Step 2: Convert to fraction form
    1,856.30/2,780.40 = 814.91/x
  3. Step 3: Cross multiply
    1,856.30x = 2,780.40 × 814.91
  4. Step 4: Simplify right side
    1,856.30x = 2,265,775.76
  5. Step 5: Solve for x
    x = 2,265,775.76/1,856.30
  6. Step 6: Final answer
    x = 1,220.59

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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.