Home / 1,315.33-1,813.85-1,020.49

Finding the Fourth Proportional to 1,315.33, 1,813.85 and 1,020.49

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Solution

The fourth proportional to 1,315.33, 1,813.85 and 1,020.49 is: 1,407.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.33 : 1,813.85 = 1,020.49 : x
  2. Step 2: Convert to fraction form
    1,315.33/1,813.85 = 1,020.49/x
  3. Step 3: Cross multiply
    1,315.33x = 1,813.85 × 1,020.49
  4. Step 4: Simplify right side
    1,315.33x = 1,851,015.79
  5. Step 5: Solve for x
    x = 1,851,015.79/1,315.33
  6. Step 6: Final answer
    x = 1,407.26

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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.