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Finding the Fourth Proportional to 886.68, 1,222.82 and 555.14

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Solution

The fourth proportional to 886.68, 1,222.82 and 555.14 is: 765.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.68 : 1,222.82 = 555.14 : x
  2. Step 2: Convert to fraction form
    886.68/1,222.82 = 555.14/x
  3. Step 3: Cross multiply
    886.68x = 1,222.82 × 555.14
  4. Step 4: Simplify right side
    886.68x = 678,834.63
  5. Step 5: Solve for x
    x = 678,834.63/886.68
  6. Step 6: Final answer
    x = 765.59

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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.