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Finding the Fourth Proportional to 1,143.51, 1,712.49 and 655.08

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Solution

The fourth proportional to 1,143.51, 1,712.49 and 655.08 is: 981.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.51 : 1,712.49 = 655.08 : x
  2. Step 2: Convert to fraction form
    1,143.51/1,712.49 = 655.08/x
  3. Step 3: Cross multiply
    1,143.51x = 1,712.49 × 655.08
  4. Step 4: Simplify right side
    1,143.51x = 1,121,817.95
  5. Step 5: Solve for x
    x = 1,121,817.95/1,143.51
  6. Step 6: Final answer
    x = 981.03

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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.