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Finding the Fourth Proportional to 948.60, 1,308.80 and 575.49

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Solution

The fourth proportional to 948.60, 1,308.80 and 575.49 is: 794.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.60 : 1,308.80 = 575.49 : x
  2. Step 2: Convert to fraction form
    948.60/1,308.80 = 575.49/x
  3. Step 3: Cross multiply
    948.60x = 1,308.80 × 575.49
  4. Step 4: Simplify right side
    948.60x = 753,198.43
  5. Step 5: Solve for x
    x = 753,198.43/948.60
  6. Step 6: Final answer
    x = 794.01

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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.