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Finding the Fourth Proportional to 913.66, 1,261.47 and 582.64

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Solution

The fourth proportional to 913.66, 1,261.47 and 582.64 is: 804.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.66 : 1,261.47 = 582.64 : x
  2. Step 2: Convert to fraction form
    913.66/1,261.47 = 582.64/x
  3. Step 3: Cross multiply
    913.66x = 1,261.47 × 582.64
  4. Step 4: Simplify right side
    913.66x = 734,982.88
  5. Step 5: Solve for x
    x = 734,982.88/913.66
  6. Step 6: Final answer
    x = 804.44

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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.