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Finding the Fourth Proportional to 769.89, 1,062.39 and 433.82

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Solution

The fourth proportional to 769.89, 1,062.39 and 433.82 is: 598.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.89 : 1,062.39 = 433.82 : x
  2. Step 2: Convert to fraction form
    769.89/1,062.39 = 433.82/x
  3. Step 3: Cross multiply
    769.89x = 1,062.39 × 433.82
  4. Step 4: Simplify right side
    769.89x = 460,883.86
  5. Step 5: Solve for x
    x = 460,883.86/769.89
  6. Step 6: Final answer
    x = 598.64

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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.