Home / 2,420.65-3,340.43-1,372.69

Finding the Fourth Proportional to 2,420.65, 3,340.43 and 1,372.69

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Solution

The fourth proportional to 2,420.65, 3,340.43 and 1,372.69 is: 1,894.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.65 : 3,340.43 = 1,372.69 : x
  2. Step 2: Convert to fraction form
    2,420.65/3,340.43 = 1,372.69/x
  3. Step 3: Cross multiply
    2,420.65x = 3,340.43 × 1,372.69
  4. Step 4: Simplify right side
    2,420.65x = 4,585,364.79
  5. Step 5: Solve for x
    x = 4,585,364.79/2,420.65
  6. Step 6: Final answer
    x = 1,894.27

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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.