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Finding the Fourth Proportional to 887.40, 1,224.90 and 625.48

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Solution

The fourth proportional to 887.40, 1,224.90 and 625.48 is: 863.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.40 : 1,224.90 = 625.48 : x
  2. Step 2: Convert to fraction form
    887.40/1,224.90 = 625.48/x
  3. Step 3: Cross multiply
    887.40x = 1,224.90 × 625.48
  4. Step 4: Simplify right side
    887.40x = 766,150.45
  5. Step 5: Solve for x
    x = 766,150.45/887.40
  6. Step 6: Final answer
    x = 863.37

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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.