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Finding the Fourth Proportional to 769.85, 1,062.24 and 438.19

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Solution

The fourth proportional to 769.85, 1,062.24 and 438.19 is: 604.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.85 : 1,062.24 = 438.19 : x
  2. Step 2: Convert to fraction form
    769.85/1,062.24 = 438.19/x
  3. Step 3: Cross multiply
    769.85x = 1,062.24 × 438.19
  4. Step 4: Simplify right side
    769.85x = 465,462.95
  5. Step 5: Solve for x
    x = 465,462.95/769.85
  6. Step 6: Final answer
    x = 604.62

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Half scale
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Double scale
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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.