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Finding the Fourth Proportional to 948.39, 1,308.90 and 575.39

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Solution

The fourth proportional to 948.39, 1,308.90 and 575.39 is: 794.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.39 : 1,308.90 = 575.39 : x
  2. Step 2: Convert to fraction form
    948.39/1,308.90 = 575.39/x
  3. Step 3: Cross multiply
    948.39x = 1,308.90 × 575.39
  4. Step 4: Simplify right side
    948.39x = 753,121.43
  5. Step 5: Solve for x
    x = 753,121.43/948.39
  6. Step 6: Final answer
    x = 794.11

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Double scale
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1.5x scale

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.