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Finding the Fourth Proportional to 1,297.20, 1,790.18 and 737.65

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Solution

The fourth proportional to 1,297.20, 1,790.18 and 737.65 is: 1,017.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.20 : 1,790.18 = 737.65 : x
  2. Step 2: Convert to fraction form
    1,297.20/1,790.18 = 737.65/x
  3. Step 3: Cross multiply
    1,297.20x = 1,790.18 × 737.65
  4. Step 4: Simplify right side
    1,297.20x = 1,320,526.28
  5. Step 5: Solve for x
    x = 1,320,526.28/1,297.20
  6. Step 6: Final answer
    x = 1,017.98

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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.