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Finding the Fourth Proportional to 504.86, 696.86 and 308.47

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Solution

The fourth proportional to 504.86, 696.86 and 308.47 is: 425.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.86 : 696.86 = 308.47 : x
  2. Step 2: Convert to fraction form
    504.86/696.86 = 308.47/x
  3. Step 3: Cross multiply
    504.86x = 696.86 × 308.47
  4. Step 4: Simplify right side
    504.86x = 214,960.40
  5. Step 5: Solve for x
    x = 214,960.40/504.86
  6. Step 6: Final answer
    x = 425.78

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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.