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Finding the Fourth Proportional to 1,110.80, 1,665.38 and 525.44

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Solution

The fourth proportional to 1,110.80, 1,665.38 and 525.44 is: 787.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.80 : 1,665.38 = 525.44 : x
  2. Step 2: Convert to fraction form
    1,110.80/1,665.38 = 525.44/x
  3. Step 3: Cross multiply
    1,110.80x = 1,665.38 × 525.44
  4. Step 4: Simplify right side
    1,110.80x = 875,057.27
  5. Step 5: Solve for x
    x = 875,057.27/1,110.80
  6. Step 6: Final answer
    x = 787.77

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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.