Home / 1,315.25-1,814.99-725.77

Finding the Fourth Proportional to 1,315.25, 1,814.99 and 725.77

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Solution

The fourth proportional to 1,315.25, 1,814.99 and 725.77 is: 1,001.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.25 : 1,814.99 = 725.77 : x
  2. Step 2: Convert to fraction form
    1,315.25/1,814.99 = 725.77/x
  3. Step 3: Cross multiply
    1,315.25x = 1,814.99 × 725.77
  4. Step 4: Simplify right side
    1,315.25x = 1,317,265.29
  5. Step 5: Solve for x
    x = 1,317,265.29/1,315.25
  6. Step 6: Final answer
    x = 1,001.53

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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.