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Finding the Fourth Proportional to 764.67, 1,054.20 and 587.73

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Solution

The fourth proportional to 764.67, 1,054.20 and 587.73 is: 810.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.67 : 1,054.20 = 587.73 : x
  2. Step 2: Convert to fraction form
    764.67/1,054.20 = 587.73/x
  3. Step 3: Cross multiply
    764.67x = 1,054.20 × 587.73
  4. Step 4: Simplify right side
    764.67x = 619,584.97
  5. Step 5: Solve for x
    x = 619,584.97/764.67
  6. Step 6: Final answer
    x = 810.26

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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.