Home / 1,279.23-1,919.93-702.51

Finding the Fourth Proportional to 1,279.23, 1,919.93 and 702.51

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Solution

The fourth proportional to 1,279.23, 1,919.93 and 702.51 is: 1,054.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.23 : 1,919.93 = 702.51 : x
  2. Step 2: Convert to fraction form
    1,279.23/1,919.93 = 702.51/x
  3. Step 3: Cross multiply
    1,279.23x = 1,919.93 × 702.51
  4. Step 4: Simplify right side
    1,279.23x = 1,348,766.51
  5. Step 5: Solve for x
    x = 1,348,766.51/1,279.23
  6. Step 6: Final answer
    x = 1,054.36

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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.