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Finding the Fourth Proportional to 380.90, 524.77 and 282.49

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Solution

The fourth proportional to 380.90, 524.77 and 282.49 is: 389.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.90 : 524.77 = 282.49 : x
  2. Step 2: Convert to fraction form
    380.90/524.77 = 282.49/x
  3. Step 3: Cross multiply
    380.90x = 524.77 × 282.49
  4. Step 4: Simplify right side
    380.90x = 148,242.28
  5. Step 5: Solve for x
    x = 148,242.28/380.90
  6. Step 6: Final answer
    x = 389.19

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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.