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Finding the Fourth Proportional to 1,617.63, 2,426.64 and 521.61

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Solution

The fourth proportional to 1,617.63, 2,426.64 and 521.61 is: 782.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.63 : 2,426.64 = 521.61 : x
  2. Step 2: Convert to fraction form
    1,617.63/2,426.64 = 521.61/x
  3. Step 3: Cross multiply
    1,617.63x = 2,426.64 × 521.61
  4. Step 4: Simplify right side
    1,617.63x = 1,265,759.69
  5. Step 5: Solve for x
    x = 1,265,759.69/1,617.63
  6. Step 6: Final answer
    x = 782.48

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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.