Home / 1,422.40-2,133.24-556.72

Finding the Fourth Proportional to 1,422.40, 2,133.24 and 556.72

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Solution

The fourth proportional to 1,422.40, 2,133.24 and 556.72 is: 834.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.40 : 2,133.24 = 556.72 : x
  2. Step 2: Convert to fraction form
    1,422.40/2,133.24 = 556.72/x
  3. Step 3: Cross multiply
    1,422.40x = 2,133.24 × 556.72
  4. Step 4: Simplify right side
    1,422.40x = 1,187,617.37
  5. Step 5: Solve for x
    x = 1,187,617.37/1,422.40
  6. Step 6: Final answer
    x = 834.94

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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.