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Finding the Fourth Proportional to 707.93, 976.96 and 388.91

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Solution

The fourth proportional to 707.93, 976.96 and 388.91 is: 536.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.93 : 976.96 = 388.91 : x
  2. Step 2: Convert to fraction form
    707.93/976.96 = 388.91/x
  3. Step 3: Cross multiply
    707.93x = 976.96 × 388.91
  4. Step 4: Simplify right side
    707.93x = 379,949.51
  5. Step 5: Solve for x
    x = 379,949.51/707.93
  6. Step 6: Final answer
    x = 536.70

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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.