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Finding the Fourth Proportional to 305.61, 458.51 and 100.20

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Solution

The fourth proportional to 305.61, 458.51 and 100.20 is: 150.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.61 : 458.51 = 100.20 : x
  2. Step 2: Convert to fraction form
    305.61/458.51 = 100.20/x
  3. Step 3: Cross multiply
    305.61x = 458.51 × 100.20
  4. Step 4: Simplify right side
    305.61x = 45,942.55
  5. Step 5: Solve for x
    x = 45,942.55/305.61
  6. Step 6: Final answer
    x = 150.33

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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.