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Finding the Fourth Proportional to 380.55, 525.11 and 214.77

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Solution

The fourth proportional to 380.55, 525.11 and 214.77 is: 296.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.55 : 525.11 = 214.77 : x
  2. Step 2: Convert to fraction form
    380.55/525.11 = 214.77/x
  3. Step 3: Cross multiply
    380.55x = 525.11 × 214.77
  4. Step 4: Simplify right side
    380.55x = 112,777.87
  5. Step 5: Solve for x
    x = 112,777.87/380.55
  6. Step 6: Final answer
    x = 296.35

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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.