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Finding the Fourth Proportional to 511.54, 705.94 and 290.50

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Solution

The fourth proportional to 511.54, 705.94 and 290.50 is: 400.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.54 : 705.94 = 290.50 : x
  2. Step 2: Convert to fraction form
    511.54/705.94 = 290.50/x
  3. Step 3: Cross multiply
    511.54x = 705.94 × 290.50
  4. Step 4: Simplify right side
    511.54x = 205,073.08
  5. Step 5: Solve for x
    x = 205,073.08/511.54
  6. Step 6: Final answer
    x = 400.90

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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.