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Finding the Fourth Proportional to 379.68, 569.70 and 148.74

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Solution

The fourth proportional to 379.68, 569.70 and 148.74 is: 223.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.68 : 569.70 = 148.74 : x
  2. Step 2: Convert to fraction form
    379.68/569.70 = 148.74/x
  3. Step 3: Cross multiply
    379.68x = 569.70 × 148.74
  4. Step 4: Simplify right side
    379.68x = 84,737.18
  5. Step 5: Solve for x
    x = 84,737.18/379.68
  6. Step 6: Final answer
    x = 223.18

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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.