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Finding the Fourth Proportional to 842.68, 1,162.98 and 493.42

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Solution

The fourth proportional to 842.68, 1,162.98 and 493.42 is: 680.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.68 : 1,162.98 = 493.42 : x
  2. Step 2: Convert to fraction form
    842.68/1,162.98 = 493.42/x
  3. Step 3: Cross multiply
    842.68x = 1,162.98 × 493.42
  4. Step 4: Simplify right side
    842.68x = 573,837.59
  5. Step 5: Solve for x
    x = 573,837.59/842.68
  6. Step 6: Final answer
    x = 680.97

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1.5x scale

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.