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Finding the Fourth Proportional to 1,698.48, 2,344.23 and 990.41

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Solution

The fourth proportional to 1,698.48, 2,344.23 and 990.41 is: 1,366.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.48 : 2,344.23 = 990.41 : x
  2. Step 2: Convert to fraction form
    1,698.48/2,344.23 = 990.41/x
  3. Step 3: Cross multiply
    1,698.48x = 2,344.23 × 990.41
  4. Step 4: Simplify right side
    1,698.48x = 2,321,737.11
  5. Step 5: Solve for x
    x = 2,321,737.11/1,698.48
  6. Step 6: Final answer
    x = 1,366.95

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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.