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Finding the Fourth Proportional to 887.45, 1,223.83 and 572.81

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Solution

The fourth proportional to 887.45, 1,223.83 and 572.81 is: 789.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.45 : 1,223.83 = 572.81 : x
  2. Step 2: Convert to fraction form
    887.45/1,223.83 = 572.81/x
  3. Step 3: Cross multiply
    887.45x = 1,223.83 × 572.81
  4. Step 4: Simplify right side
    887.45x = 701,019.20
  5. Step 5: Solve for x
    x = 701,019.20/887.45
  6. Step 6: Final answer
    x = 789.93

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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.