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Finding the Fourth Proportional to 1,728.93, 2,385.92 and 1,020.77

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Solution

The fourth proportional to 1,728.93, 2,385.92 and 1,020.77 is: 1,408.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.93 : 2,385.92 = 1,020.77 : x
  2. Step 2: Convert to fraction form
    1,728.93/2,385.92 = 1,020.77/x
  3. Step 3: Cross multiply
    1,728.93x = 2,385.92 × 1,020.77
  4. Step 4: Simplify right side
    1,728.93x = 2,435,475.85
  5. Step 5: Solve for x
    x = 2,435,475.85/1,728.93
  6. Step 6: Final answer
    x = 1,408.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.