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Finding the Fourth Proportional to 409.93, 616.96 and 307.75

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Solution

The fourth proportional to 409.93, 616.96 and 307.75 is: 463.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.93 : 616.96 = 307.75 : x
  2. Step 2: Convert to fraction form
    409.93/616.96 = 307.75/x
  3. Step 3: Cross multiply
    409.93x = 616.96 × 307.75
  4. Step 4: Simplify right side
    409.93x = 189,868.67
  5. Step 5: Solve for x
    x = 189,868.67/409.93
  6. Step 6: Final answer
    x = 463.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.