Home / 1,386.26-1,921.30-1,360.34

Finding the Fourth Proportional to 1,386.26, 1,921.30 and 1,360.34

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Solution

The fourth proportional to 1,386.26, 1,921.30 and 1,360.34 is: 1,885.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.26 : 1,921.30 = 1,360.34 : x
  2. Step 2: Convert to fraction form
    1,386.26/1,921.30 = 1,360.34/x
  3. Step 3: Cross multiply
    1,386.26x = 1,921.30 × 1,360.34
  4. Step 4: Simplify right side
    1,386.26x = 2,613,621.24
  5. Step 5: Solve for x
    x = 2,613,621.24/1,386.26
  6. Step 6: Final answer
    x = 1,885.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.