Home / 3,128.52-4,692.65-1,279.02

Finding the Fourth Proportional to 3,128.52, 4,692.65 and 1,279.02

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Solution

The fourth proportional to 3,128.52, 4,692.65 and 1,279.02 is: 1,918.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.52 : 4,692.65 = 1,279.02 : x
  2. Step 2: Convert to fraction form
    3,128.52/4,692.65 = 1,279.02/x
  3. Step 3: Cross multiply
    3,128.52x = 4,692.65 × 1,279.02
  4. Step 4: Simplify right side
    3,128.52x = 6,001,986.81
  5. Step 5: Solve for x
    x = 6,001,986.81/3,128.52
  6. Step 6: Final answer
    x = 1,918.47

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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.