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Finding the Fourth Proportional to 1,772.12, 2,658.21 and 539.47

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Solution

The fourth proportional to 1,772.12, 2,658.21 and 539.47 is: 809.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.12 : 2,658.21 = 539.47 : x
  2. Step 2: Convert to fraction form
    1,772.12/2,658.21 = 539.47/x
  3. Step 3: Cross multiply
    1,772.12x = 2,658.21 × 539.47
  4. Step 4: Simplify right side
    1,772.12x = 1,434,024.55
  5. Step 5: Solve for x
    x = 1,434,024.55/1,772.12
  6. Step 6: Final answer
    x = 809.21

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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.