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Finding the Fourth Proportional to 303.44, 455.18 and 87

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Solution

The fourth proportional to 303.44, 455.18 and 87 is: 130.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.44 : 455.18 = 87 : x
  2. Step 2: Convert to fraction form
    303.44/455.18 = 87/x
  3. Step 3: Cross multiply
    303.44x = 455.18 × 87
  4. Step 4: Simplify right side
    303.44x = 39,600.23
  5. Step 5: Solve for x
    x = 39,600.23/303.44
  6. Step 6: Final answer
    x = 130.51

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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.