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Finding the Fourth Proportional to 1,573.29, 2,171.41 and 910.55

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Solution

The fourth proportional to 1,573.29, 2,171.41 and 910.55 is: 1,256.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,573.29 : 2,171.41 = 910.55 : x
  2. Step 2: Convert to fraction form
    1,573.29/2,171.41 = 910.55/x
  3. Step 3: Cross multiply
    1,573.29x = 2,171.41 × 910.55
  4. Step 4: Simplify right side
    1,573.29x = 1,977,177.38
  5. Step 5: Solve for x
    x = 1,977,177.38/1,573.29
  6. Step 6: Final answer
    x = 1,256.72

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1.5x scale

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.