Home / 1,114.40-1,669.80-702.80

Finding the Fourth Proportional to 1,114.40, 1,669.80 and 702.80

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Solution

The fourth proportional to 1,114.40, 1,669.80 and 702.80 is: 1,053.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.40 : 1,669.80 = 702.80 : x
  2. Step 2: Convert to fraction form
    1,114.40/1,669.80 = 702.80/x
  3. Step 3: Cross multiply
    1,114.40x = 1,669.80 × 702.80
  4. Step 4: Simplify right side
    1,114.40x = 1,173,535.44
  5. Step 5: Solve for x
    x = 1,173,535.44/1,114.40
  6. Step 6: Final answer
    x = 1,053.06

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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.