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Finding the Fourth Proportional to 265.84, 398.87 and 103.53

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Solution

The fourth proportional to 265.84, 398.87 and 103.53 is: 155.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.84 : 398.87 = 103.53 : x
  2. Step 2: Convert to fraction form
    265.84/398.87 = 103.53/x
  3. Step 3: Cross multiply
    265.84x = 398.87 × 103.53
  4. Step 4: Simplify right side
    265.84x = 41,295.01
  5. Step 5: Solve for x
    x = 41,295.01/265.84
  6. Step 6: Final answer
    x = 155.34

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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.