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Finding the Fourth Proportional to 380.60, 525.54 and 275.72

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Solution

The fourth proportional to 380.60, 525.54 and 275.72 is: 380.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.60 : 525.54 = 275.72 : x
  2. Step 2: Convert to fraction form
    380.60/525.54 = 275.72/x
  3. Step 3: Cross multiply
    380.60x = 525.54 × 275.72
  4. Step 4: Simplify right side
    380.60x = 144,901.89
  5. Step 5: Solve for x
    x = 144,901.89/380.60
  6. Step 6: Final answer
    x = 380.72

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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.