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Finding the Fourth Proportional to 303.18, 454.74 and 86.74

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Solution

The fourth proportional to 303.18, 454.74 and 86.74 is: 130.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.18 : 454.74 = 86.74 : x
  2. Step 2: Convert to fraction form
    303.18/454.74 = 86.74/x
  3. Step 3: Cross multiply
    303.18x = 454.74 × 86.74
  4. Step 4: Simplify right side
    303.18x = 39,444.15
  5. Step 5: Solve for x
    x = 39,444.15/303.18
  6. Step 6: Final answer
    x = 130.10

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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.