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Finding the Fourth Proportional to 969.91, 1,454.86 and 239.47

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Solution

The fourth proportional to 969.91, 1,454.86 and 239.47 is: 359.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.91 : 1,454.86 = 239.47 : x
  2. Step 2: Convert to fraction form
    969.91/1,454.86 = 239.47/x
  3. Step 3: Cross multiply
    969.91x = 1,454.86 × 239.47
  4. Step 4: Simplify right side
    969.91x = 348,400.17
  5. Step 5: Solve for x
    x = 348,400.17/969.91
  6. Step 6: Final answer
    x = 359.21

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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.