Home / 2,479.28-3,421.16-1,431.68

Finding the Fourth Proportional to 2,479.28, 3,421.16 and 1,431.68

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Solution

The fourth proportional to 2,479.28, 3,421.16 and 1,431.68 is: 1,975.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.28 : 3,421.16 = 1,431.68 : x
  2. Step 2: Convert to fraction form
    2,479.28/3,421.16 = 1,431.68/x
  3. Step 3: Cross multiply
    2,479.28x = 3,421.16 × 1,431.68
  4. Step 4: Simplify right side
    2,479.28x = 4,898,006.35
  5. Step 5: Solve for x
    x = 4,898,006.35/2,479.28
  6. Step 6: Final answer
    x = 1,975.58

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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.