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Finding the Fourth Proportional to 528.14, 727.85 and 380.52

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Solution

The fourth proportional to 528.14, 727.85 and 380.52 is: 524.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.14 : 727.85 = 380.52 : x
  2. Step 2: Convert to fraction form
    528.14/727.85 = 380.52/x
  3. Step 3: Cross multiply
    528.14x = 727.85 × 380.52
  4. Step 4: Simplify right side
    528.14x = 276,962.43
  5. Step 5: Solve for x
    x = 276,962.43/528.14
  6. Step 6: Final answer
    x = 524.41

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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.