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Finding the Fourth Proportional to 310.21, 465.24 and 90.77

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Solution

The fourth proportional to 310.21, 465.24 and 90.77 is: 136.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.21 : 465.24 = 90.77 : x
  2. Step 2: Convert to fraction form
    310.21/465.24 = 90.77/x
  3. Step 3: Cross multiply
    310.21x = 465.24 × 90.77
  4. Step 4: Simplify right side
    310.21x = 42,231.24
  5. Step 5: Solve for x
    x = 42,231.24/310.21
  6. Step 6: Final answer
    x = 136.14

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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.