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Finding the Fourth Proportional to 380.65, 525.28 and 214.87

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Solution

The fourth proportional to 380.65, 525.28 and 214.87 is: 296.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.65 : 525.28 = 214.87 : x
  2. Step 2: Convert to fraction form
    380.65/525.28 = 214.87/x
  3. Step 3: Cross multiply
    380.65x = 525.28 × 214.87
  4. Step 4: Simplify right side
    380.65x = 112,866.91
  5. Step 5: Solve for x
    x = 112,866.91/380.65
  6. Step 6: Final answer
    x = 296.51

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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.