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Finding the Fourth Proportional to 511.50, 705.78 and 346.03

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Solution

The fourth proportional to 511.50, 705.78 and 346.03 is: 477.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.50 : 705.78 = 346.03 : x
  2. Step 2: Convert to fraction form
    511.50/705.78 = 346.03/x
  3. Step 3: Cross multiply
    511.50x = 705.78 × 346.03
  4. Step 4: Simplify right side
    511.50x = 244,221.05
  5. Step 5: Solve for x
    x = 244,221.05/511.50
  6. Step 6: Final answer
    x = 477.46

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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.