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Finding the Fourth Proportional to 511.30, 705.59 and 290.25

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Solution

The fourth proportional to 511.30, 705.59 and 290.25 is: 400.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.30 : 705.59 = 290.25 : x
  2. Step 2: Convert to fraction form
    511.30/705.59 = 290.25/x
  3. Step 3: Cross multiply
    511.30x = 705.59 × 290.25
  4. Step 4: Simplify right side
    511.30x = 204,797.13
  5. Step 5: Solve for x
    x = 204,797.13/511.30
  6. Step 6: Final answer
    x = 400.54

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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.