Home / 1,455.38-2,172.88-1,279.05

Finding the Fourth Proportional to 1,455.38, 2,172.88 and 1,279.05

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Solution

The fourth proportional to 1,455.38, 2,172.88 and 1,279.05 is: 1,909.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.38 : 2,172.88 = 1,279.05 : x
  2. Step 2: Convert to fraction form
    1,455.38/2,172.88 = 1,279.05/x
  3. Step 3: Cross multiply
    1,455.38x = 2,172.88 × 1,279.05
  4. Step 4: Simplify right side
    1,455.38x = 2,779,223.70
  5. Step 5: Solve for x
    x = 2,779,223.70/1,455.38
  6. Step 6: Final answer
    x = 1,909.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.