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Finding the Fourth Proportional to 768.30, 1,060.15 and 453.58

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Solution

The fourth proportional to 768.30, 1,060.15 and 453.58 is: 625.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.30 : 1,060.15 = 453.58 : x
  2. Step 2: Convert to fraction form
    768.30/1,060.15 = 453.58/x
  3. Step 3: Cross multiply
    768.30x = 1,060.15 × 453.58
  4. Step 4: Simplify right side
    768.30x = 480,855.27
  5. Step 5: Solve for x
    x = 480,855.27/768.30
  6. Step 6: Final answer
    x = 625.87

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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.