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Finding the Fourth Proportional to 1,033.98, 1,549.80 and 687.54

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Solution

The fourth proportional to 1,033.98, 1,549.80 and 687.54 is: 1,030.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.98 : 1,549.80 = 687.54 : x
  2. Step 2: Convert to fraction form
    1,033.98/1,549.80 = 687.54/x
  3. Step 3: Cross multiply
    1,033.98x = 1,549.80 × 687.54
  4. Step 4: Simplify right side
    1,033.98x = 1,065,549.49
  5. Step 5: Solve for x
    x = 1,065,549.49/1,033.98
  6. Step 6: Final answer
    x = 1,030.53

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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.