Home / 1,128.18-1,692.23-306.42

Finding the Fourth Proportional to 1,128.18, 1,692.23 and 306.42

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Solution

The fourth proportional to 1,128.18, 1,692.23 and 306.42 is: 459.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.18 : 1,692.23 = 306.42 : x
  2. Step 2: Convert to fraction form
    1,128.18/1,692.23 = 306.42/x
  3. Step 3: Cross multiply
    1,128.18x = 1,692.23 × 306.42
  4. Step 4: Simplify right side
    1,128.18x = 518,542.10
  5. Step 5: Solve for x
    x = 518,542.10/1,128.18
  6. Step 6: Final answer
    x = 459.63

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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.