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Finding the Fourth Proportional to 711.50, 982.06 and 431.69

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Solution

The fourth proportional to 711.50, 982.06 and 431.69 is: 595.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.50 : 982.06 = 431.69 : x
  2. Step 2: Convert to fraction form
    711.50/982.06 = 431.69/x
  3. Step 3: Cross multiply
    711.50x = 982.06 × 431.69
  4. Step 4: Simplify right side
    711.50x = 423,939.49
  5. Step 5: Solve for x
    x = 423,939.49/711.50
  6. Step 6: Final answer
    x = 595.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.