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Finding the Fourth Proportional to 1,065.72, 1,598.84 and 449.09

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Solution

The fourth proportional to 1,065.72, 1,598.84 and 449.09 is: 673.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.72 : 1,598.84 = 449.09 : x
  2. Step 2: Convert to fraction form
    1,065.72/1,598.84 = 449.09/x
  3. Step 3: Cross multiply
    1,065.72x = 1,598.84 × 449.09
  4. Step 4: Simplify right side
    1,065.72x = 718,023.06
  5. Step 5: Solve for x
    x = 718,023.06/1,065.72
  6. Step 6: Final answer
    x = 673.74

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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.