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Finding the Fourth Proportional to 711.59, 982.40 and 554.31

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Solution

The fourth proportional to 711.59, 982.40 and 554.31 is: 765.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.59 : 982.40 = 554.31 : x
  2. Step 2: Convert to fraction form
    711.59/982.40 = 554.31/x
  3. Step 3: Cross multiply
    711.59x = 982.40 × 554.31
  4. Step 4: Simplify right side
    711.59x = 544,551.37
  5. Step 5: Solve for x
    x = 544,551.37/711.59
  6. Step 6: Final answer
    x = 765.27

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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.