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Finding the Fourth Proportional to 684.18, 1,026.30 and 293.91

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Solution

The fourth proportional to 684.18, 1,026.30 and 293.91 is: 440.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.18 : 1,026.30 = 293.91 : x
  2. Step 2: Convert to fraction form
    684.18/1,026.30 = 293.91/x
  3. Step 3: Cross multiply
    684.18x = 1,026.30 × 293.91
  4. Step 4: Simplify right side
    684.18x = 301,639.84
  5. Step 5: Solve for x
    x = 301,639.84/684.18
  6. Step 6: Final answer
    x = 440.88

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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.