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Finding the Fourth Proportional to 1,260.59, 1,890.62 and 480.56

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Solution

The fourth proportional to 1,260.59, 1,890.62 and 480.56 is: 720.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.59 : 1,890.62 = 480.56 : x
  2. Step 2: Convert to fraction form
    1,260.59/1,890.62 = 480.56/x
  3. Step 3: Cross multiply
    1,260.59x = 1,890.62 × 480.56
  4. Step 4: Simplify right side
    1,260.59x = 908,558.67
  5. Step 5: Solve for x
    x = 908,558.67/1,260.59
  6. Step 6: Final answer
    x = 720.74

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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.