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Finding the Fourth Proportional to 434.30, 651.46 and 109.67

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Solution

The fourth proportional to 434.30, 651.46 and 109.67 is: 164.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.30 : 651.46 = 109.67 : x
  2. Step 2: Convert to fraction form
    434.30/651.46 = 109.67/x
  3. Step 3: Cross multiply
    434.30x = 651.46 × 109.67
  4. Step 4: Simplify right side
    434.30x = 71,445.49
  5. Step 5: Solve for x
    x = 71,445.49/434.30
  6. Step 6: Final answer
    x = 164.51

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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.