Home / 1,247.20-1,869.28-882.09

Finding the Fourth Proportional to 1,247.20, 1,869.28 and 882.09

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Solution

The fourth proportional to 1,247.20, 1,869.28 and 882.09 is: 1,322.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.20 : 1,869.28 = 882.09 : x
  2. Step 2: Convert to fraction form
    1,247.20/1,869.28 = 882.09/x
  3. Step 3: Cross multiply
    1,247.20x = 1,869.28 × 882.09
  4. Step 4: Simplify right side
    1,247.20x = 1,648,870.99
  5. Step 5: Solve for x
    x = 1,648,870.99/1,247.20
  6. Step 6: Final answer
    x = 1,322.06

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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.