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Finding the Fourth Proportional to 1,924.87, 2,887.88 and 692.39

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Solution

The fourth proportional to 1,924.87, 2,887.88 and 692.39 is: 1,038.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,924.87 : 2,887.88 = 692.39 : x
  2. Step 2: Convert to fraction form
    1,924.87/2,887.88 = 692.39/x
  3. Step 3: Cross multiply
    1,924.87x = 2,887.88 × 692.39
  4. Step 4: Simplify right side
    1,924.87x = 1,999,521.33
  5. Step 5: Solve for x
    x = 1,999,521.33/1,924.87
  6. Step 6: Final answer
    x = 1,038.78

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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.