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Finding the Fourth Proportional to 886.17, 1,223.45 and 555.05

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Solution

The fourth proportional to 886.17, 1,223.45 and 555.05 is: 766.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.17 : 1,223.45 = 555.05 : x
  2. Step 2: Convert to fraction form
    886.17/1,223.45 = 555.05/x
  3. Step 3: Cross multiply
    886.17x = 1,223.45 × 555.05
  4. Step 4: Simplify right side
    886.17x = 679,067.03
  5. Step 5: Solve for x
    x = 679,067.03/886.17
  6. Step 6: Final answer
    x = 766.29

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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.