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Finding the Fourth Proportional to 303.47, 455.28 and 87.05

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Solution

The fourth proportional to 303.47, 455.28 and 87.05 is: 130.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.47 : 455.28 = 87.05 : x
  2. Step 2: Convert to fraction form
    303.47/455.28 = 87.05/x
  3. Step 3: Cross multiply
    303.47x = 455.28 × 87.05
  4. Step 4: Simplify right side
    303.47x = 39,629.52
  5. Step 5: Solve for x
    x = 39,629.52/303.47
  6. Step 6: Final answer
    x = 130.59

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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.