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Finding the Fourth Proportional to 712.51, 982.91 and 554.86

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Solution

The fourth proportional to 712.51, 982.91 and 554.86 is: 765.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.51 : 982.91 = 554.86 : x
  2. Step 2: Convert to fraction form
    712.51/982.91 = 554.86/x
  3. Step 3: Cross multiply
    712.51x = 982.91 × 554.86
  4. Step 4: Simplify right side
    712.51x = 545,377.44
  5. Step 5: Solve for x
    x = 545,377.44/712.51
  6. Step 6: Final answer
    x = 765.43

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1.5x scale

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.