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Finding the Fourth Proportional to 684.41, 1,026.80 and 245.76

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Solution

The fourth proportional to 684.41, 1,026.80 and 245.76 is: 368.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.41 : 1,026.80 = 245.76 : x
  2. Step 2: Convert to fraction form
    684.41/1,026.80 = 245.76/x
  3. Step 3: Cross multiply
    684.41x = 1,026.80 × 245.76
  4. Step 4: Simplify right side
    684.41x = 252,346.37
  5. Step 5: Solve for x
    x = 252,346.37/684.41
  6. Step 6: Final answer
    x = 368.71

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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.