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Finding the Fourth Proportional to 265.19, 397.94 and 143.55

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Solution

The fourth proportional to 265.19, 397.94 and 143.55 is: 215.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.19 : 397.94 = 143.55 : x
  2. Step 2: Convert to fraction form
    265.19/397.94 = 143.55/x
  3. Step 3: Cross multiply
    265.19x = 397.94 × 143.55
  4. Step 4: Simplify right side
    265.19x = 57,123.57
  5. Step 5: Solve for x
    x = 57,123.57/265.19
  6. Step 6: Final answer
    x = 215.41

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