Home / 1,315.44-1,973.53-391.03

Finding the Fourth Proportional to 1,315.44, 1,973.53 and 391.03

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Solution

The fourth proportional to 1,315.44, 1,973.53 and 391.03 is: 586.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.44 : 1,973.53 = 391.03 : x
  2. Step 2: Convert to fraction form
    1,315.44/1,973.53 = 391.03/x
  3. Step 3: Cross multiply
    1,315.44x = 1,973.53 × 391.03
  4. Step 4: Simplify right side
    1,315.44x = 771,716.09
  5. Step 5: Solve for x
    x = 771,716.09/1,315.44
  6. Step 6: Final answer
    x = 586.66

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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.