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Finding the Fourth Proportional to 579.81, 869.70 and 146.97

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Solution

The fourth proportional to 579.81, 869.70 and 146.97 is: 220.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.81 : 869.70 = 146.97 : x
  2. Step 2: Convert to fraction form
    579.81/869.70 = 146.97/x
  3. Step 3: Cross multiply
    579.81x = 869.70 × 146.97
  4. Step 4: Simplify right side
    579.81x = 127,820.36
  5. Step 5: Solve for x
    x = 127,820.36/579.81
  6. Step 6: Final answer
    x = 220.45

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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.