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Finding the Fourth Proportional to 969.16, 1,454.04 and 319.74

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Solution

The fourth proportional to 969.16, 1,454.04 and 319.74 is: 479.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.16 : 1,454.04 = 319.74 : x
  2. Step 2: Convert to fraction form
    969.16/1,454.04 = 319.74/x
  3. Step 3: Cross multiply
    969.16x = 1,454.04 × 319.74
  4. Step 4: Simplify right side
    969.16x = 464,914.75
  5. Step 5: Solve for x
    x = 464,914.75/969.16
  6. Step 6: Final answer
    x = 479.71

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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.