Home / 3,689.40-5,531.80-1,223.60

Finding the Fourth Proportional to 3,689.40, 5,531.80 and 1,223.60

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Solution

The fourth proportional to 3,689.40, 5,531.80 and 1,223.60 is: 1,834.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.40 : 5,531.80 = 1,223.60 : x
  2. Step 2: Convert to fraction form
    3,689.40/5,531.80 = 1,223.60/x
  3. Step 3: Cross multiply
    3,689.40x = 5,531.80 × 1,223.60
  4. Step 4: Simplify right side
    3,689.40x = 6,768,710.48
  5. Step 5: Solve for x
    x = 6,768,710.48/3,689.40
  6. Step 6: Final answer
    x = 1,834.64

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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.