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Finding the Fourth Proportional to 887.09, 1,329.28 and 808.79

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Solution

The fourth proportional to 887.09, 1,329.28 and 808.79 is: 1,211.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.09 : 1,329.28 = 808.79 : x
  2. Step 2: Convert to fraction form
    887.09/1,329.28 = 808.79/x
  3. Step 3: Cross multiply
    887.09x = 1,329.28 × 808.79
  4. Step 4: Simplify right side
    887.09x = 1,075,108.37
  5. Step 5: Solve for x
    x = 1,075,108.37/887.09
  6. Step 6: Final answer
    x = 1,211.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.