Home / 2,479.04-3,420.05-1,640.15

Finding the Fourth Proportional to 2,479.04, 3,420.05 and 1,640.15

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Solution

The fourth proportional to 2,479.04, 3,420.05 and 1,640.15 is: 2,262.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.04 : 3,420.05 = 1,640.15 : x
  2. Step 2: Convert to fraction form
    2,479.04/3,420.05 = 1,640.15/x
  3. Step 3: Cross multiply
    2,479.04x = 3,420.05 × 1,640.15
  4. Step 4: Simplify right side
    2,479.04x = 5,609,369.71
  5. Step 5: Solve for x
    x = 5,609,369.71/2,479.04
  6. Step 6: Final answer
    x = 2,262.72

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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.