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Finding the Fourth Proportional to 1,573.12, 2,171.49 and 910.54

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Solution

The fourth proportional to 1,573.12, 2,171.49 and 910.54 is: 1,256.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,573.12 : 2,171.49 = 910.54 : x
  2. Step 2: Convert to fraction form
    1,573.12/2,171.49 = 910.54/x
  3. Step 3: Cross multiply
    1,573.12x = 2,171.49 × 910.54
  4. Step 4: Simplify right side
    1,573.12x = 1,977,217.65
  5. Step 5: Solve for x
    x = 1,977,217.65/1,573.12
  6. Step 6: Final answer
    x = 1,256.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.