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Finding the Fourth Proportional to 1,185.42, 1,778.03 and 454.80

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Solution

The fourth proportional to 1,185.42, 1,778.03 and 454.80 is: 682.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.42 : 1,778.03 = 454.80 : x
  2. Step 2: Convert to fraction form
    1,185.42/1,778.03 = 454.80/x
  3. Step 3: Cross multiply
    1,185.42x = 1,778.03 × 454.80
  4. Step 4: Simplify right side
    1,185.42x = 808,648.04
  5. Step 5: Solve for x
    x = 808,648.04/1,185.42
  6. Step 6: Final answer
    x = 682.16

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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.