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Finding the Fourth Proportional to 434.81, 652.46 and 261.80

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Solution

The fourth proportional to 434.81, 652.46 and 261.80 is: 392.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.81 : 652.46 = 261.80 : x
  2. Step 2: Convert to fraction form
    434.81/652.46 = 261.80/x
  3. Step 3: Cross multiply
    434.81x = 652.46 × 261.80
  4. Step 4: Simplify right side
    434.81x = 170,814.03
  5. Step 5: Solve for x
    x = 170,814.03/434.81
  6. Step 6: Final answer
    x = 392.85

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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.