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Finding the Fourth Proportional to 1,494.90, 2,241.56 and 520.79

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Solution

The fourth proportional to 1,494.90, 2,241.56 and 520.79 is: 780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,494.90 : 2,241.56 = 520.79 : x
  2. Step 2: Convert to fraction form
    1,494.90/2,241.56 = 520.79/x
  3. Step 3: Cross multiply
    1,494.90x = 2,241.56 × 520.79
  4. Step 4: Simplify right side
    1,494.90x = 1,167,368.22
  5. Step 5: Solve for x
    x = 1,167,368.22/1,494.90
  6. Step 6: Final answer
    x = 780.90

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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.