Home / 1,423.10-2,135.10-692.75

Finding the Fourth Proportional to 1,423.10, 2,135.10 and 692.75

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Solution

The fourth proportional to 1,423.10, 2,135.10 and 692.75 is: 1,039.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.10 : 2,135.10 = 692.75 : x
  2. Step 2: Convert to fraction form
    1,423.10/2,135.10 = 692.75/x
  3. Step 3: Cross multiply
    1,423.10x = 2,135.10 × 692.75
  4. Step 4: Simplify right side
    1,423.10x = 1,479,090.53
  5. Step 5: Solve for x
    x = 1,479,090.53/1,423.10
  6. Step 6: Final answer
    x = 1,039.34

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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.