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Finding the Fourth Proportional to 1,342.90, 2,014.43 and 521.26

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Solution

The fourth proportional to 1,342.90, 2,014.43 and 521.26 is: 781.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,342.90 : 2,014.43 = 521.26 : x
  2. Step 2: Convert to fraction form
    1,342.90/2,014.43 = 521.26/x
  3. Step 3: Cross multiply
    1,342.90x = 2,014.43 × 521.26
  4. Step 4: Simplify right side
    1,342.90x = 1,050,041.78
  5. Step 5: Solve for x
    x = 1,050,041.78/1,342.90
  6. Step 6: Final answer
    x = 781.92

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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.