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Finding the Fourth Proportional to 1,040.94, 1,561.40 and 492.36

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Solution

The fourth proportional to 1,040.94, 1,561.40 and 492.36 is: 738.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.94 : 1,561.40 = 492.36 : x
  2. Step 2: Convert to fraction form
    1,040.94/1,561.40 = 492.36/x
  3. Step 3: Cross multiply
    1,040.94x = 1,561.40 × 492.36
  4. Step 4: Simplify right side
    1,040.94x = 768,770.90
  5. Step 5: Solve for x
    x = 768,770.90/1,040.94
  6. Step 6: Final answer
    x = 738.54

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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.