Home / 2,479.12-3,420.86-1,431.24

Finding the Fourth Proportional to 2,479.12, 3,420.86 and 1,431.24

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Solution

The fourth proportional to 2,479.12, 3,420.86 and 1,431.24 is: 1,974.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.12 : 3,420.86 = 1,431.24 : x
  2. Step 2: Convert to fraction form
    2,479.12/3,420.86 = 1,431.24/x
  3. Step 3: Cross multiply
    2,479.12x = 3,420.86 × 1,431.24
  4. Step 4: Simplify right side
    2,479.12x = 4,896,071.67
  5. Step 5: Solve for x
    x = 4,896,071.67/2,479.12
  6. Step 6: Final answer
    x = 1,974.92

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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.