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Finding the Fourth Proportional to 265.63, 366.65 and 155.09

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Solution

The fourth proportional to 265.63, 366.65 and 155.09 is: 214.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.63 : 366.65 = 155.09 : x
  2. Step 2: Convert to fraction form
    265.63/366.65 = 155.09/x
  3. Step 3: Cross multiply
    265.63x = 366.65 × 155.09
  4. Step 4: Simplify right side
    265.63x = 56,863.88
  5. Step 5: Solve for x
    x = 56,863.88/265.63
  6. Step 6: Final answer
    x = 214.07

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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.