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Finding the Fourth Proportional to 1,645.80, 2,468.57 and 491.55

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Solution

The fourth proportional to 1,645.80, 2,468.57 and 491.55 is: 737.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.80 : 2,468.57 = 491.55 : x
  2. Step 2: Convert to fraction form
    1,645.80/2,468.57 = 491.55/x
  3. Step 3: Cross multiply
    1,645.80x = 2,468.57 × 491.55
  4. Step 4: Simplify right side
    1,645.80x = 1,213,423.13
  5. Step 5: Solve for x
    x = 1,213,423.13/1,645.80
  6. Step 6: Final answer
    x = 737.28

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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.