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Finding the Fourth Proportional to 969.58, 1,454.47 and 311.30

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Solution

The fourth proportional to 969.58, 1,454.47 and 311.30 is: 466.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.58 : 1,454.47 = 311.30 : x
  2. Step 2: Convert to fraction form
    969.58/1,454.47 = 311.30/x
  3. Step 3: Cross multiply
    969.58x = 1,454.47 × 311.30
  4. Step 4: Simplify right side
    969.58x = 452,768.46
  5. Step 5: Solve for x
    x = 452,768.46/969.58
  6. Step 6: Final answer
    x = 466.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.