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Finding the Fourth Proportional to 407.49, 610.39 and 339.13

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Solution

The fourth proportional to 407.49, 610.39 and 339.13 is: 507.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.49 : 610.39 = 339.13 : x
  2. Step 2: Convert to fraction form
    407.49/610.39 = 339.13/x
  3. Step 3: Cross multiply
    407.49x = 610.39 × 339.13
  4. Step 4: Simplify right side
    407.49x = 207,001.56
  5. Step 5: Solve for x
    x = 207,001.56/407.49
  6. Step 6: Final answer
    x = 507.99

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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.