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Finding the Fourth Proportional to 386.90, 534.10 and 247.04

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Solution

The fourth proportional to 386.90, 534.10 and 247.04 is: 341.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.90 : 534.10 = 247.04 : x
  2. Step 2: Convert to fraction form
    386.90/534.10 = 247.04/x
  3. Step 3: Cross multiply
    386.90x = 534.10 × 247.04
  4. Step 4: Simplify right side
    386.90x = 131,944.06
  5. Step 5: Solve for x
    x = 131,944.06/386.90
  6. Step 6: Final answer
    x = 341.03

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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.