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Finding the Fourth Proportional to 1,185.13, 1,776.68 and 454.19

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Solution

The fourth proportional to 1,185.13, 1,776.68 and 454.19 is: 680.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.13 : 1,776.68 = 454.19 : x
  2. Step 2: Convert to fraction form
    1,185.13/1,776.68 = 454.19/x
  3. Step 3: Cross multiply
    1,185.13x = 1,776.68 × 454.19
  4. Step 4: Simplify right side
    1,185.13x = 806,948.02
  5. Step 5: Solve for x
    x = 806,948.02/1,185.13
  6. Step 6: Final answer
    x = 680.90

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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.