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Finding the Fourth Proportional to 387.23, 581.08 and 143.93

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Solution

The fourth proportional to 387.23, 581.08 and 143.93 is: 215.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.23 : 581.08 = 143.93 : x
  2. Step 2: Convert to fraction form
    387.23/581.08 = 143.93/x
  3. Step 3: Cross multiply
    387.23x = 581.08 × 143.93
  4. Step 4: Simplify right side
    387.23x = 83,631.22
  5. Step 5: Solve for x
    x = 83,631.22/387.23
  6. Step 6: Final answer
    x = 215.97

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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.