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Finding the Fourth Proportional to 886.11, 1,222.79 and 493.10

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Solution

The fourth proportional to 886.11, 1,222.79 and 493.10 is: 680.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.11 : 1,222.79 = 493.10 : x
  2. Step 2: Convert to fraction form
    886.11/1,222.79 = 493.10/x
  3. Step 3: Cross multiply
    886.11x = 1,222.79 × 493.10
  4. Step 4: Simplify right side
    886.11x = 602,949.17
  5. Step 5: Solve for x
    x = 602,949.17/886.11
  6. Step 6: Final answer
    x = 680.45

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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.