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Finding the Fourth Proportional to 920.26, 1,269.68 and 527.21

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Solution

The fourth proportional to 920.26, 1,269.68 and 527.21 is: 727.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.26 : 1,269.68 = 527.21 : x
  2. Step 2: Convert to fraction form
    920.26/1,269.68 = 527.21/x
  3. Step 3: Cross multiply
    920.26x = 1,269.68 × 527.21
  4. Step 4: Simplify right side
    920.26x = 669,383.77
  5. Step 5: Solve for x
    x = 669,383.77/920.26
  6. Step 6: Final answer
    x = 727.38

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1.5x scale

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.