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Finding the Fourth Proportional to 289.25, 434.06 and 118.25

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Solution

The fourth proportional to 289.25, 434.06 and 118.25 is: 177.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.25 : 434.06 = 118.25 : x
  2. Step 2: Convert to fraction form
    289.25/434.06 = 118.25/x
  3. Step 3: Cross multiply
    289.25x = 434.06 × 118.25
  4. Step 4: Simplify right side
    289.25x = 51,327.60
  5. Step 5: Solve for x
    x = 51,327.60/289.25
  6. Step 6: Final answer
    x = 177.45

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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.