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Finding the Fourth Proportional to 1,203.13, 1,805.46 and 655.66

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Solution

The fourth proportional to 1,203.13, 1,805.46 and 655.66 is: 983.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.13 : 1,805.46 = 655.66 : x
  2. Step 2: Convert to fraction form
    1,203.13/1,805.46 = 655.66/x
  3. Step 3: Cross multiply
    1,203.13x = 1,805.46 × 655.66
  4. Step 4: Simplify right side
    1,203.13x = 1,183,767.90
  5. Step 5: Solve for x
    x = 1,183,767.90/1,203.13
  6. Step 6: Final answer
    x = 983.91

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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.