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Finding the Fourth Proportional to 887.78, 1,331.73 and 477.22

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Solution

The fourth proportional to 887.78, 1,331.73 and 477.22 is: 715.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.78 : 1,331.73 = 477.22 : x
  2. Step 2: Convert to fraction form
    887.78/1,331.73 = 477.22/x
  3. Step 3: Cross multiply
    887.78x = 1,331.73 × 477.22
  4. Step 4: Simplify right side
    887.78x = 635,528.19
  5. Step 5: Solve for x
    x = 635,528.19/887.78
  6. Step 6: Final answer
    x = 715.86

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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.