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Finding the Fourth Proportional to 886.92, 1,223.47 and 555.28

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Solution

The fourth proportional to 886.92, 1,223.47 and 555.28 is: 765.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.92 : 1,223.47 = 555.28 : x
  2. Step 2: Convert to fraction form
    886.92/1,223.47 = 555.28/x
  3. Step 3: Cross multiply
    886.92x = 1,223.47 × 555.28
  4. Step 4: Simplify right side
    886.92x = 679,362.30
  5. Step 5: Solve for x
    x = 679,362.30/886.92
  6. Step 6: Final answer
    x = 765.98

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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.