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Finding the Fourth Proportional to 887.74, 1,331.83 and 400.79

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Solution

The fourth proportional to 887.74, 1,331.83 and 400.79 is: 601.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.74 : 1,331.83 = 400.79 : x
  2. Step 2: Convert to fraction form
    887.74/1,331.83 = 400.79/x
  3. Step 3: Cross multiply
    887.74x = 1,331.83 × 400.79
  4. Step 4: Simplify right side
    887.74x = 533,785.72
  5. Step 5: Solve for x
    x = 533,785.72/887.74
  6. Step 6: Final answer
    x = 601.28

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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.