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Finding the Fourth Proportional to 887.36, 1,224.63 and 665.91

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Solution

The fourth proportional to 887.36, 1,224.63 and 665.91 is: 919.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.36 : 1,224.63 = 665.91 : x
  2. Step 2: Convert to fraction form
    887.36/1,224.63 = 665.91/x
  3. Step 3: Cross multiply
    887.36x = 1,224.63 × 665.91
  4. Step 4: Simplify right side
    887.36x = 815,493.36
  5. Step 5: Solve for x
    x = 815,493.36/887.36
  6. Step 6: Final answer
    x = 919.02

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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.