Home / 1,128.18-1,692.05-306.35

Finding the Fourth Proportional to 1,128.18, 1,692.05 and 306.35

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Solution

The fourth proportional to 1,128.18, 1,692.05 and 306.35 is: 459.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.18 : 1,692.05 = 306.35 : x
  2. Step 2: Convert to fraction form
    1,128.18/1,692.05 = 306.35/x
  3. Step 3: Cross multiply
    1,128.18x = 1,692.05 × 306.35
  4. Step 4: Simplify right side
    1,128.18x = 518,349.53
  5. Step 5: Solve for x
    x = 518,349.53/1,128.18
  6. Step 6: Final answer
    x = 459.46

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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.