Home / 3,970.95-5,479.71-2,398.74

Finding the Fourth Proportional to 3,970.95, 5,479.71 and 2,398.74

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Solution

The fourth proportional to 3,970.95, 5,479.71 and 2,398.74 is: 3,310.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.95 : 5,479.71 = 2,398.74 : x
  2. Step 2: Convert to fraction form
    3,970.95/5,479.71 = 2,398.74/x
  3. Step 3: Cross multiply
    3,970.95x = 5,479.71 × 2,398.74
  4. Step 4: Simplify right side
    3,970.95x = 13,144,399.57
  5. Step 5: Solve for x
    x = 13,144,399.57/3,970.95
  6. Step 6: Final answer
    x = 3,310.14

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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.