Home / 1,538.91-2,310.80-1,215.72

Finding the Fourth Proportional to 1,538.91, 2,310.80 and 1,215.72

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Solution

The fourth proportional to 1,538.91, 2,310.80 and 1,215.72 is: 1,825.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.91 : 2,310.80 = 1,215.72 : x
  2. Step 2: Convert to fraction form
    1,538.91/2,310.80 = 1,215.72/x
  3. Step 3: Cross multiply
    1,538.91x = 2,310.80 × 1,215.72
  4. Step 4: Simplify right side
    1,538.91x = 2,809,285.78
  5. Step 5: Solve for x
    x = 2,809,285.78/1,538.91
  6. Step 6: Final answer
    x = 1,825.50

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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.