Home / 2,455.29-3,388.07-1,407.21

Finding the Fourth Proportional to 2,455.29, 3,388.07 and 1,407.21

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Solution

The fourth proportional to 2,455.29, 3,388.07 and 1,407.21 is: 1,941.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.29 : 3,388.07 = 1,407.21 : x
  2. Step 2: Convert to fraction form
    2,455.29/3,388.07 = 1,407.21/x
  3. Step 3: Cross multiply
    2,455.29x = 3,388.07 × 1,407.21
  4. Step 4: Simplify right side
    2,455.29x = 4,767,718.95
  5. Step 5: Solve for x
    x = 4,767,718.95/2,455.29
  6. Step 6: Final answer
    x = 1,941.81

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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.