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Finding the Fourth Proportional to 763.73, 1,054.94 and 670.79

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Solution

The fourth proportional to 763.73, 1,054.94 and 670.79 is: 926.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.73 : 1,054.94 = 670.79 : x
  2. Step 2: Convert to fraction form
    763.73/1,054.94 = 670.79/x
  3. Step 3: Cross multiply
    763.73x = 1,054.94 × 670.79
  4. Step 4: Simplify right side
    763.73x = 707,643.20
  5. Step 5: Solve for x
    x = 707,643.20/763.73
  6. Step 6: Final answer
    x = 926.56

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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.