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Finding the Fourth Proportional to 887.44, 1,223.01 and 638.33

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Solution

The fourth proportional to 887.44, 1,223.01 and 638.33 is: 879.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.44 : 1,223.01 = 638.33 : x
  2. Step 2: Convert to fraction form
    887.44/1,223.01 = 638.33/x
  3. Step 3: Cross multiply
    887.44x = 1,223.01 × 638.33
  4. Step 4: Simplify right side
    887.44x = 780,685.64
  5. Step 5: Solve for x
    x = 780,685.64/887.44
  6. Step 6: Final answer
    x = 879.70

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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.