Home / 1,315.23-1,814.97-725.76

Finding the Fourth Proportional to 1,315.23, 1,814.97 and 725.76

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Solution

The fourth proportional to 1,315.23, 1,814.97 and 725.76 is: 1,001.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.23 : 1,814.97 = 725.76 : x
  2. Step 2: Convert to fraction form
    1,315.23/1,814.97 = 725.76/x
  3. Step 3: Cross multiply
    1,315.23x = 1,814.97 × 725.76
  4. Step 4: Simplify right side
    1,315.23x = 1,317,232.63
  5. Step 5: Solve for x
    x = 1,317,232.63/1,315.23
  6. Step 6: Final answer
    x = 1,001.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.