Home / 1,384.70-2,077.05-1,279.10

Finding the Fourth Proportional to 1,384.70, 2,077.05 and 1,279.10

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Solution

The fourth proportional to 1,384.70, 2,077.05 and 1,279.10 is: 1,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.70 : 2,077.05 = 1,279.10 : x
  2. Step 2: Convert to fraction form
    1,384.70/2,077.05 = 1,279.10/x
  3. Step 3: Cross multiply
    1,384.70x = 2,077.05 × 1,279.10
  4. Step 4: Simplify right side
    1,384.70x = 2,656,754.66
  5. Step 5: Solve for x
    x = 2,656,754.66/1,384.70
  6. Step 6: Final answer
    x = 1,918.65

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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.