Home / 1,489.90-2,228.14-1,138.62

Finding the Fourth Proportional to 1,489.90, 2,228.14 and 1,138.62

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Solution

The fourth proportional to 1,489.90, 2,228.14 and 1,138.62 is: 1,702.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.90 : 2,228.14 = 1,138.62 : x
  2. Step 2: Convert to fraction form
    1,489.90/2,228.14 = 1,138.62/x
  3. Step 3: Cross multiply
    1,489.90x = 2,228.14 × 1,138.62
  4. Step 4: Simplify right side
    1,489.90x = 2,537,004.77
  5. Step 5: Solve for x
    x = 2,537,004.77/1,489.90
  6. Step 6: Final answer
    x = 1,702.80

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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.