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Finding the Fourth Proportional to 711.89, 982.43 and 463.56

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Solution

The fourth proportional to 711.89, 982.43 and 463.56 is: 639.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.89 : 982.43 = 463.56 : x
  2. Step 2: Convert to fraction form
    711.89/982.43 = 463.56/x
  3. Step 3: Cross multiply
    711.89x = 982.43 × 463.56
  4. Step 4: Simplify right side
    711.89x = 455,410.99
  5. Step 5: Solve for x
    x = 455,410.99/711.89
  6. Step 6: Final answer
    x = 639.72

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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.