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Finding the Fourth Proportional to 1,718.21, 2,577.31 and 485.62

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Solution

The fourth proportional to 1,718.21, 2,577.31 and 485.62 is: 728.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.21 : 2,577.31 = 485.62 : x
  2. Step 2: Convert to fraction form
    1,718.21/2,577.31 = 485.62/x
  3. Step 3: Cross multiply
    1,718.21x = 2,577.31 × 485.62
  4. Step 4: Simplify right side
    1,718.21x = 1,251,593.28
  5. Step 5: Solve for x
    x = 1,251,593.28/1,718.21
  6. Step 6: Final answer
    x = 728.43

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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.