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Finding the Fourth Proportional to 387.10, 534.23 and 229.83

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Solution

The fourth proportional to 387.10, 534.23 and 229.83 is: 317.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.10 : 534.23 = 229.83 : x
  2. Step 2: Convert to fraction form
    387.10/534.23 = 229.83/x
  3. Step 3: Cross multiply
    387.10x = 534.23 × 229.83
  4. Step 4: Simplify right side
    387.10x = 122,782.08
  5. Step 5: Solve for x
    x = 122,782.08/387.10
  6. Step 6: Final answer
    x = 317.18

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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.