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Finding the Fourth Proportional to 920.25, 1,269.79 and 527.30

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Solution

The fourth proportional to 920.25, 1,269.79 and 527.30 is: 727.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.25 : 1,269.79 = 527.30 : x
  2. Step 2: Convert to fraction form
    920.25/1,269.79 = 527.30/x
  3. Step 3: Cross multiply
    920.25x = 1,269.79 × 527.30
  4. Step 4: Simplify right side
    920.25x = 669,560.27
  5. Step 5: Solve for x
    x = 669,560.27/920.25
  6. Step 6: Final answer
    x = 727.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.