Home / 1,315.29-1,973.21-449.67

Finding the Fourth Proportional to 1,315.29, 1,973.21 and 449.67

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Solution

The fourth proportional to 1,315.29, 1,973.21 and 449.67 is: 674.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.29 : 1,973.21 = 449.67 : x
  2. Step 2: Convert to fraction form
    1,315.29/1,973.21 = 449.67/x
  3. Step 3: Cross multiply
    1,315.29x = 1,973.21 × 449.67
  4. Step 4: Simplify right side
    1,315.29x = 887,291.09
  5. Step 5: Solve for x
    x = 887,291.09/1,315.29
  6. Step 6: Final answer
    x = 674.60

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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.