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Finding the Fourth Proportional to 380.57, 525.28 and 214.88

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Solution

The fourth proportional to 380.57, 525.28 and 214.88 is: 296.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.57 : 525.28 = 214.88 : x
  2. Step 2: Convert to fraction form
    380.57/525.28 = 214.88/x
  3. Step 3: Cross multiply
    380.57x = 525.28 × 214.88
  4. Step 4: Simplify right side
    380.57x = 112,869.81
  5. Step 5: Solve for x
    x = 112,869.81/380.57
  6. Step 6: Final answer
    x = 296.58

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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.