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Finding the Fourth Proportional to 465.78, 698.56 and 141.06

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Solution

The fourth proportional to 465.78, 698.56 and 141.06 is: 211.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.78 : 698.56 = 141.06 : x
  2. Step 2: Convert to fraction form
    465.78/698.56 = 141.06/x
  3. Step 3: Cross multiply
    465.78x = 698.56 × 141.06
  4. Step 4: Simplify right side
    465.78x = 98,538.87
  5. Step 5: Solve for x
    x = 98,538.87/465.78
  6. Step 6: Final answer
    x = 211.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.