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Finding the Fourth Proportional to 768.49, 1,060.53 and 432.40

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Solution

The fourth proportional to 768.49, 1,060.53 and 432.40 is: 596.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.49 : 1,060.53 = 432.40 : x
  2. Step 2: Convert to fraction form
    768.49/1,060.53 = 432.40/x
  3. Step 3: Cross multiply
    768.49x = 1,060.53 × 432.40
  4. Step 4: Simplify right side
    768.49x = 458,576.90
  5. Step 5: Solve for x
    x = 458,576.90/768.49
  6. Step 6: Final answer
    x = 596.72

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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.