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Finding the Fourth Proportional to 309.92, 465.90 and 307.49

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Solution

The fourth proportional to 309.92, 465.90 and 307.49 is: 462.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.92 : 465.90 = 307.49 : x
  2. Step 2: Convert to fraction form
    309.92/465.90 = 307.49/x
  3. Step 3: Cross multiply
    309.92x = 465.90 × 307.49
  4. Step 4: Simplify right side
    309.92x = 143,258.05
  5. Step 5: Solve for x
    x = 143,258.05/309.92
  6. Step 6: Final answer
    x = 462.24

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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.