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Finding the Fourth Proportional to 1,025.74, 1,539.16 and 448.66

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Solution

The fourth proportional to 1,025.74, 1,539.16 and 448.66 is: 673.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.74 : 1,539.16 = 448.66 : x
  2. Step 2: Convert to fraction form
    1,025.74/1,539.16 = 448.66/x
  3. Step 3: Cross multiply
    1,025.74x = 1,539.16 × 448.66
  4. Step 4: Simplify right side
    1,025.74x = 690,559.53
  5. Step 5: Solve for x
    x = 690,559.53/1,025.74
  6. Step 6: Final answer
    x = 673.23

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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.