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Finding the Fourth Proportional to 886.55, 1,329.83 and 612.56

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Solution

The fourth proportional to 886.55, 1,329.83 and 612.56 is: 918.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.55 : 1,329.83 = 612.56 : x
  2. Step 2: Convert to fraction form
    886.55/1,329.83 = 612.56/x
  3. Step 3: Cross multiply
    886.55x = 1,329.83 × 612.56
  4. Step 4: Simplify right side
    886.55x = 814,600.66
  5. Step 5: Solve for x
    x = 814,600.66/886.55
  6. Step 6: Final answer
    x = 918.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.