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Finding the Fourth Proportional to 379.29, 524.30 and 291.81

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Solution

The fourth proportional to 379.29, 524.30 and 291.81 is: 403.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.29 : 524.30 = 291.81 : x
  2. Step 2: Convert to fraction form
    379.29/524.30 = 291.81/x
  3. Step 3: Cross multiply
    379.29x = 524.30 × 291.81
  4. Step 4: Simplify right side
    379.29x = 152,995.98
  5. Step 5: Solve for x
    x = 152,995.98/379.29
  6. Step 6: Final answer
    x = 403.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.