Home / 1,260.60-1,890.91-438.90

Finding the Fourth Proportional to 1,260.60, 1,890.91 and 438.90

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Solution

The fourth proportional to 1,260.60, 1,890.91 and 438.90 is: 658.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.60 : 1,890.91 = 438.90 : x
  2. Step 2: Convert to fraction form
    1,260.60/1,890.91 = 438.90/x
  3. Step 3: Cross multiply
    1,260.60x = 1,890.91 × 438.90
  4. Step 4: Simplify right side
    1,260.60x = 829,920.40
  5. Step 5: Solve for x
    x = 829,920.40/1,260.60
  6. Step 6: Final answer
    x = 658.35

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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.