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Finding the Fourth Proportional to 1,178.81, 1,768.12 and 301.31

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Solution

The fourth proportional to 1,178.81, 1,768.12 and 301.31 is: 451.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.81 : 1,768.12 = 301.31 : x
  2. Step 2: Convert to fraction form
    1,178.81/1,768.12 = 301.31/x
  3. Step 3: Cross multiply
    1,178.81x = 1,768.12 × 301.31
  4. Step 4: Simplify right side
    1,178.81x = 532,752.24
  5. Step 5: Solve for x
    x = 532,752.24/1,178.81
  6. Step 6: Final answer
    x = 451.94

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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.