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Finding the Fourth Proportional to 511.29, 705.58 and 290.23

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Solution

The fourth proportional to 511.29, 705.58 and 290.23 is: 400.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.29 : 705.58 = 290.23 : x
  2. Step 2: Convert to fraction form
    511.29/705.58 = 290.23/x
  3. Step 3: Cross multiply
    511.29x = 705.58 × 290.23
  4. Step 4: Simplify right side
    511.29x = 204,777.99
  5. Step 5: Solve for x
    x = 204,777.99/511.29
  6. Step 6: Final answer
    x = 400.51

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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.