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Finding the Fourth Proportional to 265.12, 396.66 and 143.47

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Solution

The fourth proportional to 265.12, 396.66 and 143.47 is: 214.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.12 : 396.66 = 143.47 : x
  2. Step 2: Convert to fraction form
    265.12/396.66 = 143.47/x
  3. Step 3: Cross multiply
    265.12x = 396.66 × 143.47
  4. Step 4: Simplify right side
    265.12x = 56,908.81
  5. Step 5: Solve for x
    x = 56,908.81/265.12
  6. Step 6: Final answer
    x = 214.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.