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Finding the Fourth Proportional to 496.61, 685.59 and 339.47

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Solution

The fourth proportional to 496.61, 685.59 and 339.47 is: 468.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.61 : 685.59 = 339.47 : x
  2. Step 2: Convert to fraction form
    496.61/685.59 = 339.47/x
  3. Step 3: Cross multiply
    496.61x = 685.59 × 339.47
  4. Step 4: Simplify right side
    496.61x = 232,733.81
  5. Step 5: Solve for x
    x = 232,733.81/496.61
  6. Step 6: Final answer
    x = 468.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.