Home / 1,542.02-2,309.79-720.95

Finding the Fourth Proportional to 1,542.02, 2,309.79 and 720.95

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Solution

The fourth proportional to 1,542.02, 2,309.79 and 720.95 is: 1,079.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.02 : 2,309.79 = 720.95 : x
  2. Step 2: Convert to fraction form
    1,542.02/2,309.79 = 720.95/x
  3. Step 3: Cross multiply
    1,542.02x = 2,309.79 × 720.95
  4. Step 4: Simplify right side
    1,542.02x = 1,665,243.10
  5. Step 5: Solve for x
    x = 1,665,243.10/1,542.02
  6. Step 6: Final answer
    x = 1,079.91

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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.