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Finding the Fourth Proportional to 1,718.37, 2,577.45 and 485.91

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Solution

The fourth proportional to 1,718.37, 2,577.45 and 485.91 is: 728.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.37 : 2,577.45 = 485.91 : x
  2. Step 2: Convert to fraction form
    1,718.37/2,577.45 = 485.91/x
  3. Step 3: Cross multiply
    1,718.37x = 2,577.45 × 485.91
  4. Step 4: Simplify right side
    1,718.37x = 1,252,408.73
  5. Step 5: Solve for x
    x = 1,252,408.73/1,718.37
  6. Step 6: Final answer
    x = 728.84

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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.