Home / 1,315.51-1,973.39-449.89

Finding the Fourth Proportional to 1,315.51, 1,973.39 and 449.89

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Solution

The fourth proportional to 1,315.51, 1,973.39 and 449.89 is: 674.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.51 : 1,973.39 = 449.89 : x
  2. Step 2: Convert to fraction form
    1,315.51/1,973.39 = 449.89/x
  3. Step 3: Cross multiply
    1,315.51x = 1,973.39 × 449.89
  4. Step 4: Simplify right side
    1,315.51x = 887,799.68
  5. Step 5: Solve for x
    x = 887,799.68/1,315.51
  6. Step 6: Final answer
    x = 674.87

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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.