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Finding the Fourth Proportional to 887.89, 1,225.26 and 556.50

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Solution

The fourth proportional to 887.89, 1,225.26 and 556.50 is: 767.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.89 : 1,225.26 = 556.50 : x
  2. Step 2: Convert to fraction form
    887.89/1,225.26 = 556.50/x
  3. Step 3: Cross multiply
    887.89x = 1,225.26 × 556.50
  4. Step 4: Simplify right side
    887.89x = 681,851.06
  5. Step 5: Solve for x
    x = 681,851.06/887.89
  6. Step 6: Final answer
    x = 767.95

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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.