Home / 1,553.80-2,331.18-688.84

Finding the Fourth Proportional to 1,553.80, 2,331.18 and 688.84

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Solution

The fourth proportional to 1,553.80, 2,331.18 and 688.84 is: 1,033.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.80 : 2,331.18 = 688.84 : x
  2. Step 2: Convert to fraction form
    1,553.80/2,331.18 = 688.84/x
  3. Step 3: Cross multiply
    1,553.80x = 2,331.18 × 688.84
  4. Step 4: Simplify right side
    1,553.80x = 1,605,810.03
  5. Step 5: Solve for x
    x = 1,605,810.03/1,553.80
  6. Step 6: Final answer
    x = 1,033.47

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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.