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Finding the Fourth Proportional to 1,494.56, 2,240.40 and 764.48

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Solution

The fourth proportional to 1,494.56, 2,240.40 and 764.48 is: 1,145.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,494.56 : 2,240.40 = 764.48 : x
  2. Step 2: Convert to fraction form
    1,494.56/2,240.40 = 764.48/x
  3. Step 3: Cross multiply
    1,494.56x = 2,240.40 × 764.48
  4. Step 4: Simplify right side
    1,494.56x = 1,712,740.99
  5. Step 5: Solve for x
    x = 1,712,740.99/1,494.56
  6. Step 6: Final answer
    x = 1,145.98

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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.