Home / 1,687.02-2,531.70-713.22

Finding the Fourth Proportional to 1,687.02, 2,531.70 and 713.22

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Solution

The fourth proportional to 1,687.02, 2,531.70 and 713.22 is: 1,070.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.02 : 2,531.70 = 713.22 : x
  2. Step 2: Convert to fraction form
    1,687.02/2,531.70 = 713.22/x
  3. Step 3: Cross multiply
    1,687.02x = 2,531.70 × 713.22
  4. Step 4: Simplify right side
    1,687.02x = 1,805,659.07
  5. Step 5: Solve for x
    x = 1,805,659.07/1,687.02
  6. Step 6: Final answer
    x = 1,070.32

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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.