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Finding the Fourth Proportional to 1,089.57, 1,631.72 and 625.94

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Solution

The fourth proportional to 1,089.57, 1,631.72 and 625.94 is: 937.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.57 : 1,631.72 = 625.94 : x
  2. Step 2: Convert to fraction form
    1,089.57/1,631.72 = 625.94/x
  3. Step 3: Cross multiply
    1,089.57x = 1,631.72 × 625.94
  4. Step 4: Simplify right side
    1,089.57x = 1,021,350.66
  5. Step 5: Solve for x
    x = 1,021,350.66/1,089.57
  6. Step 6: Final answer
    x = 937.39

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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.