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Finding the Fourth Proportional to 707.39, 976.22 and 388.37

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Solution

The fourth proportional to 707.39, 976.22 and 388.37 is: 535.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.39 : 976.22 = 388.37 : x
  2. Step 2: Convert to fraction form
    707.39/976.22 = 388.37/x
  3. Step 3: Cross multiply
    707.39x = 976.22 × 388.37
  4. Step 4: Simplify right side
    707.39x = 379,134.56
  5. Step 5: Solve for x
    x = 379,134.56/707.39
  6. Step 6: Final answer
    x = 535.96

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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.