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Finding the Fourth Proportional to 1,762.05, 2,639.13 and 1,728.19

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Solution

The fourth proportional to 1,762.05, 2,639.13 and 1,728.19 is: 2,588.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,762.05 : 2,639.13 = 1,728.19 : x
  2. Step 2: Convert to fraction form
    1,762.05/2,639.13 = 1,728.19/x
  3. Step 3: Cross multiply
    1,762.05x = 2,639.13 × 1,728.19
  4. Step 4: Simplify right side
    1,762.05x = 4,560,909.77
  5. Step 5: Solve for x
    x = 4,560,909.77/1,762.05
  6. Step 6: Final answer
    x = 2,588.41

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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.