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Finding the Fourth Proportional to 412.59, 616.29 and 309.33

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Solution

The fourth proportional to 412.59, 616.29 and 309.33 is: 462.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.59 : 616.29 = 309.33 : x
  2. Step 2: Convert to fraction form
    412.59/616.29 = 309.33/x
  3. Step 3: Cross multiply
    412.59x = 616.29 × 309.33
  4. Step 4: Simplify right side
    412.59x = 190,636.99
  5. Step 5: Solve for x
    x = 190,636.99/412.59
  6. Step 6: Final answer
    x = 462.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.