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Finding the Fourth Proportional to 887.54, 1,225.88 and 805.53

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Solution

The fourth proportional to 887.54, 1,225.88 and 805.53 is: 1,112.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.54 : 1,225.88 = 805.53 : x
  2. Step 2: Convert to fraction form
    887.54/1,225.88 = 805.53/x
  3. Step 3: Cross multiply
    887.54x = 1,225.88 × 805.53
  4. Step 4: Simplify right side
    887.54x = 987,479.09
  5. Step 5: Solve for x
    x = 987,479.09/887.54
  6. Step 6: Final answer
    x = 1,112.61

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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.