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Finding the Fourth Proportional to 239.19, 330 and 145.91

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Solution

The fourth proportional to 239.19, 330 and 145.91 is: 201.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.19 : 330 = 145.91 : x
  2. Step 2: Convert to fraction form
    239.19/330 = 145.91/x
  3. Step 3: Cross multiply
    239.19x = 330 × 145.91
  4. Step 4: Simplify right side
    239.19x = 48,150.30
  5. Step 5: Solve for x
    x = 48,150.30/239.19
  6. Step 6: Final answer
    x = 201.31

Related Problems

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1.5x scale

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.