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Finding the Fourth Proportional to 1,185.63, 1,777.43 and 454.69

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Solution

The fourth proportional to 1,185.63, 1,777.43 and 454.69 is: 681.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.63 : 1,777.43 = 454.69 : x
  2. Step 2: Convert to fraction form
    1,185.63/1,777.43 = 454.69/x
  3. Step 3: Cross multiply
    1,185.63x = 1,777.43 × 454.69
  4. Step 4: Simplify right side
    1,185.63x = 808,177.37
  5. Step 5: Solve for x
    x = 808,177.37/1,185.63
  6. Step 6: Final answer
    x = 681.65

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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.