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Finding the Fourth Proportional to 387.10, 534.36 and 247.23

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Solution

The fourth proportional to 387.10, 534.36 and 247.23 is: 341.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.10 : 534.36 = 247.23 : x
  2. Step 2: Convert to fraction form
    387.10/534.36 = 247.23/x
  3. Step 3: Cross multiply
    387.10x = 534.36 × 247.23
  4. Step 4: Simplify right side
    387.10x = 132,109.82
  5. Step 5: Solve for x
    x = 132,109.82/387.10
  6. Step 6: Final answer
    x = 341.28

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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.