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Finding the Fourth Proportional to 511.92, 705.78 and 372.06

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Solution

The fourth proportional to 511.92, 705.78 and 372.06 is: 512.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.92 : 705.78 = 372.06 : x
  2. Step 2: Convert to fraction form
    511.92/705.78 = 372.06/x
  3. Step 3: Cross multiply
    511.92x = 705.78 × 372.06
  4. Step 4: Simplify right side
    511.92x = 262,592.51
  5. Step 5: Solve for x
    x = 262,592.51/511.92
  6. Step 6: Final answer
    x = 512.96

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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.