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Finding the Fourth Proportional to 1,447.76, 2,171.30 and 570.23

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Solution

The fourth proportional to 1,447.76, 2,171.30 and 570.23 is: 855.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.76 : 2,171.30 = 570.23 : x
  2. Step 2: Convert to fraction form
    1,447.76/2,171.30 = 570.23/x
  3. Step 3: Cross multiply
    1,447.76x = 2,171.30 × 570.23
  4. Step 4: Simplify right side
    1,447.76x = 1,238,137.55
  5. Step 5: Solve for x
    x = 1,238,137.55/1,447.76
  6. Step 6: Final answer
    x = 855.21

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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.