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Finding the Fourth Proportional to 887.18, 1,224.65 and 555.68

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Solution

The fourth proportional to 887.18, 1,224.65 and 555.68 is: 767.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.18 : 1,224.65 = 555.68 : x
  2. Step 2: Convert to fraction form
    887.18/1,224.65 = 555.68/x
  3. Step 3: Cross multiply
    887.18x = 1,224.65 × 555.68
  4. Step 4: Simplify right side
    887.18x = 680,517.96
  5. Step 5: Solve for x
    x = 680,517.96/887.18
  6. Step 6: Final answer
    x = 767.06

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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.