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Finding the Fourth Proportional to 289.45, 434.27 and 97.07

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Solution

The fourth proportional to 289.45, 434.27 and 97.07 is: 145.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.45 : 434.27 = 97.07 : x
  2. Step 2: Convert to fraction form
    289.45/434.27 = 97.07/x
  3. Step 3: Cross multiply
    289.45x = 434.27 × 97.07
  4. Step 4: Simplify right side
    289.45x = 42,154.10
  5. Step 5: Solve for x
    x = 42,154.10/289.45
  6. Step 6: Final answer
    x = 145.64

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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.