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Finding the Fourth Proportional to 434.45, 651.68 and 145.89

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Solution

The fourth proportional to 434.45, 651.68 and 145.89 is: 218.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.45 : 651.68 = 145.89 : x
  2. Step 2: Convert to fraction form
    434.45/651.68 = 145.89/x
  3. Step 3: Cross multiply
    434.45x = 651.68 × 145.89
  4. Step 4: Simplify right side
    434.45x = 95,073.60
  5. Step 5: Solve for x
    x = 95,073.60/434.45
  6. Step 6: Final answer
    x = 218.84

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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.