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Finding the Fourth Proportional to 1,178.91, 1,768.36 and 529.19

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Solution

The fourth proportional to 1,178.91, 1,768.36 and 529.19 is: 793.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.91 : 1,768.36 = 529.19 : x
  2. Step 2: Convert to fraction form
    1,178.91/1,768.36 = 529.19/x
  3. Step 3: Cross multiply
    1,178.91x = 1,768.36 × 529.19
  4. Step 4: Simplify right side
    1,178.91x = 935,798.43
  5. Step 5: Solve for x
    x = 935,798.43/1,178.91
  6. Step 6: Final answer
    x = 793.78

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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.