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Finding the Fourth Proportional to 684.39, 1,026.35 and 273.45

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Solution

The fourth proportional to 684.39, 1,026.35 and 273.45 is: 410.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.39 : 1,026.35 = 273.45 : x
  2. Step 2: Convert to fraction form
    684.39/1,026.35 = 273.45/x
  3. Step 3: Cross multiply
    684.39x = 1,026.35 × 273.45
  4. Step 4: Simplify right side
    684.39x = 280,654.04
  5. Step 5: Solve for x
    x = 280,654.04/684.39
  6. Step 6: Final answer
    x = 410.08

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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.