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Finding the Fourth Proportional to 1,445.82, 2,167.99 and 521.23

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Solution

The fourth proportional to 1,445.82, 2,167.99 and 521.23 is: 781.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.82 : 2,167.99 = 521.23 : x
  2. Step 2: Convert to fraction form
    1,445.82/2,167.99 = 521.23/x
  3. Step 3: Cross multiply
    1,445.82x = 2,167.99 × 521.23
  4. Step 4: Simplify right side
    1,445.82x = 1,130,021.43
  5. Step 5: Solve for x
    x = 1,130,021.43/1,445.82
  6. Step 6: Final answer
    x = 781.58

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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.