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Finding the Fourth Proportional to 1,727.88, 2,591.77 and 429.35

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Solution

The fourth proportional to 1,727.88, 2,591.77 and 429.35 is: 644.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,727.88 : 2,591.77 = 429.35 : x
  2. Step 2: Convert to fraction form
    1,727.88/2,591.77 = 429.35/x
  3. Step 3: Cross multiply
    1,727.88x = 2,591.77 × 429.35
  4. Step 4: Simplify right side
    1,727.88x = 1,112,761.34
  5. Step 5: Solve for x
    x = 1,112,761.34/1,727.88
  6. Step 6: Final answer
    x = 644.00

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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.