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Finding the Fourth Proportional to 379.70, 569.11 and 148.47

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Solution

The fourth proportional to 379.70, 569.11 and 148.47 is: 222.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.70 : 569.11 = 148.47 : x
  2. Step 2: Convert to fraction form
    379.70/569.11 = 148.47/x
  3. Step 3: Cross multiply
    379.70x = 569.11 × 148.47
  4. Step 4: Simplify right side
    379.70x = 84,495.02
  5. Step 5: Solve for x
    x = 84,495.02/379.70
  6. Step 6: Final answer
    x = 222.53

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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.