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Finding the Fourth Proportional to 303.41, 455.20 and 86.99

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Solution

The fourth proportional to 303.41, 455.20 and 86.99 is: 130.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.41 : 455.20 = 86.99 : x
  2. Step 2: Convert to fraction form
    303.41/455.20 = 86.99/x
  3. Step 3: Cross multiply
    303.41x = 455.20 × 86.99
  4. Step 4: Simplify right side
    303.41x = 39,595.35
  5. Step 5: Solve for x
    x = 39,595.35/303.41
  6. Step 6: Final answer
    x = 130.50

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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.