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Finding the Fourth Proportional to 886.39, 1,223.04 and 493.34

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Solution

The fourth proportional to 886.39, 1,223.04 and 493.34 is: 680.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.39 : 1,223.04 = 493.34 : x
  2. Step 2: Convert to fraction form
    886.39/1,223.04 = 493.34/x
  3. Step 3: Cross multiply
    886.39x = 1,223.04 × 493.34
  4. Step 4: Simplify right side
    886.39x = 603,374.87
  5. Step 5: Solve for x
    x = 603,374.87/886.39
  6. Step 6: Final answer
    x = 680.71

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Half scale
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Double scale
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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.