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Finding the Fourth Proportional to 684.22, 1,026.94 and 424.72

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Solution

The fourth proportional to 684.22, 1,026.94 and 424.72 is: 637.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.22 : 1,026.94 = 424.72 : x
  2. Step 2: Convert to fraction form
    684.22/1,026.94 = 424.72/x
  3. Step 3: Cross multiply
    684.22x = 1,026.94 × 424.72
  4. Step 4: Simplify right side
    684.22x = 436,161.96
  5. Step 5: Solve for x
    x = 436,161.96/684.22
  6. Step 6: Final answer
    x = 637.46

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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.