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Finding the Fourth Proportional to 1,737.88, 2,398.22 and 991.77

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Solution

The fourth proportional to 1,737.88, 2,398.22 and 991.77 is: 1,368.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,737.88 : 2,398.22 = 991.77 : x
  2. Step 2: Convert to fraction form
    1,737.88/2,398.22 = 991.77/x
  3. Step 3: Cross multiply
    1,737.88x = 2,398.22 × 991.77
  4. Step 4: Simplify right side
    1,737.88x = 2,378,482.65
  5. Step 5: Solve for x
    x = 2,378,482.65/1,737.88
  6. Step 6: Final answer
    x = 1,368.61

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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.