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Finding the Fourth Proportional to 387.18, 581.06 and 233.28

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Solution

The fourth proportional to 387.18, 581.06 and 233.28 is: 350.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.18 : 581.06 = 233.28 : x
  2. Step 2: Convert to fraction form
    387.18/581.06 = 233.28/x
  3. Step 3: Cross multiply
    387.18x = 581.06 × 233.28
  4. Step 4: Simplify right side
    387.18x = 135,550.26
  5. Step 5: Solve for x
    x = 135,550.26/387.18
  6. Step 6: Final answer
    x = 350.10

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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.