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Finding the Fourth Proportional to 289.55, 434.14 and 152.75

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Solution

The fourth proportional to 289.55, 434.14 and 152.75 is: 229.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.55 : 434.14 = 152.75 : x
  2. Step 2: Convert to fraction form
    289.55/434.14 = 152.75/x
  3. Step 3: Cross multiply
    289.55x = 434.14 × 152.75
  4. Step 4: Simplify right side
    289.55x = 66,315.59
  5. Step 5: Solve for x
    x = 66,315.59/289.55
  6. Step 6: Final answer
    x = 229.03

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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.