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Finding the Fourth Proportional to 265.35, 366.21 and 257.16

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Solution

The fourth proportional to 265.35, 366.21 and 257.16 is: 354.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.35 : 366.21 = 257.16 : x
  2. Step 2: Convert to fraction form
    265.35/366.21 = 257.16/x
  3. Step 3: Cross multiply
    265.35x = 366.21 × 257.16
  4. Step 4: Simplify right side
    265.35x = 94,174.56
  5. Step 5: Solve for x
    x = 94,174.56/265.35
  6. Step 6: Final answer
    x = 354.91

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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.