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Finding the Fourth Proportional to 379.65, 569.37 and 148.49

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Solution

The fourth proportional to 379.65, 569.37 and 148.49 is: 222.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.65 : 569.37 = 148.49 : x
  2. Step 2: Convert to fraction form
    379.65/569.37 = 148.49/x
  3. Step 3: Cross multiply
    379.65x = 569.37 × 148.49
  4. Step 4: Simplify right side
    379.65x = 84,547.17
  5. Step 5: Solve for x
    x = 84,547.17/379.65
  6. Step 6: Final answer
    x = 222.70

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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.