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Finding the Fourth Proportional to 387.99, 581.90 and 114.03

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Solution

The fourth proportional to 387.99, 581.90 and 114.03 is: 171.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.99 : 581.90 = 114.03 : x
  2. Step 2: Convert to fraction form
    387.99/581.90 = 114.03/x
  3. Step 3: Cross multiply
    387.99x = 581.90 × 114.03
  4. Step 4: Simplify right side
    387.99x = 66,353.49
  5. Step 5: Solve for x
    x = 66,353.49/387.99
  6. Step 6: Final answer
    x = 171.02

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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.