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Finding the Fourth Proportional to 913.76, 1,261.13 and 582.33

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Solution

The fourth proportional to 913.76, 1,261.13 and 582.33 is: 803.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.76 : 1,261.13 = 582.33 : x
  2. Step 2: Convert to fraction form
    913.76/1,261.13 = 582.33/x
  3. Step 3: Cross multiply
    913.76x = 1,261.13 × 582.33
  4. Step 4: Simplify right side
    913.76x = 734,393.83
  5. Step 5: Solve for x
    x = 734,393.83/913.76
  6. Step 6: Final answer
    x = 803.71

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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.