Home / 1,020.51-1,531.22-655.20

Finding the Fourth Proportional to 1,020.51, 1,531.22 and 655.20

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Solution

The fourth proportional to 1,020.51, 1,531.22 and 655.20 is: 983.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.51 : 1,531.22 = 655.20 : x
  2. Step 2: Convert to fraction form
    1,020.51/1,531.22 = 655.20/x
  3. Step 3: Cross multiply
    1,020.51x = 1,531.22 × 655.20
  4. Step 4: Simplify right side
    1,020.51x = 1,003,252.07
  5. Step 5: Solve for x
    x = 1,003,252.07/1,020.51
  6. Step 6: Final answer
    x = 983.09

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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.