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Finding the Fourth Proportional to 379.94, 569.50 and 148.72

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Solution

The fourth proportional to 379.94, 569.50 and 148.72 is: 222.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.94 : 569.50 = 148.72 : x
  2. Step 2: Convert to fraction form
    379.94/569.50 = 148.72/x
  3. Step 3: Cross multiply
    379.94x = 569.50 × 148.72
  4. Step 4: Simplify right side
    379.94x = 84,696.04
  5. Step 5: Solve for x
    x = 84,696.04/379.94
  6. Step 6: Final answer
    x = 222.92

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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.