Home / 1,322.20-1,983.17-542.22

Finding the Fourth Proportional to 1,322.20, 1,983.17 and 542.22

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Solution

The fourth proportional to 1,322.20, 1,983.17 and 542.22 is: 813.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.20 : 1,983.17 = 542.22 : x
  2. Step 2: Convert to fraction form
    1,322.20/1,983.17 = 542.22/x
  3. Step 3: Cross multiply
    1,322.20x = 1,983.17 × 542.22
  4. Step 4: Simplify right side
    1,322.20x = 1,075,314.44
  5. Step 5: Solve for x
    x = 1,075,314.44/1,322.20
  6. Step 6: Final answer
    x = 813.28

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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.