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Finding the Fourth Proportional to 763.82, 1,054.26 and 469.33

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Solution

The fourth proportional to 763.82, 1,054.26 and 469.33 is: 647.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.82 : 1,054.26 = 469.33 : x
  2. Step 2: Convert to fraction form
    763.82/1,054.26 = 469.33/x
  3. Step 3: Cross multiply
    763.82x = 1,054.26 × 469.33
  4. Step 4: Simplify right side
    763.82x = 494,790.57
  5. Step 5: Solve for x
    x = 494,790.57/763.82
  6. Step 6: Final answer
    x = 647.79

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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.