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Finding the Fourth Proportional to 887.49, 1,329.39 and 692.28

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Solution

The fourth proportional to 887.49, 1,329.39 and 692.28 is: 1,036.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.49 : 1,329.39 = 692.28 : x
  2. Step 2: Convert to fraction form
    887.49/1,329.39 = 692.28/x
  3. Step 3: Cross multiply
    887.49x = 1,329.39 × 692.28
  4. Step 4: Simplify right side
    887.49x = 920,310.11
  5. Step 5: Solve for x
    x = 920,310.11/887.49
  6. Step 6: Final answer
    x = 1,036.98

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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.