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Finding the Fourth Proportional to 948.21, 1,308.45 and 575.71

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Solution

The fourth proportional to 948.21, 1,308.45 and 575.71 is: 794.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.21 : 1,308.45 = 575.71 : x
  2. Step 2: Convert to fraction form
    948.21/1,308.45 = 575.71/x
  3. Step 3: Cross multiply
    948.21x = 1,308.45 × 575.71
  4. Step 4: Simplify right side
    948.21x = 753,286.64
  5. Step 5: Solve for x
    x = 753,286.64/948.21
  6. Step 6: Final answer
    x = 794.43

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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.