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Finding the Fourth Proportional to 886.20, 1,222.99 and 493.22

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Solution

The fourth proportional to 886.20, 1,222.99 and 493.22 is: 680.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.20 : 1,222.99 = 493.22 : x
  2. Step 2: Convert to fraction form
    886.20/1,222.99 = 493.22/x
  3. Step 3: Cross multiply
    886.20x = 1,222.99 × 493.22
  4. Step 4: Simplify right side
    886.20x = 603,203.13
  5. Step 5: Solve for x
    x = 603,203.13/886.20
  6. Step 6: Final answer
    x = 680.66

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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.