Home / 2,120.10-2,924.91-1,281

Finding the Fourth Proportional to 2,120.10, 2,924.91 and 1,281

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Solution

The fourth proportional to 2,120.10, 2,924.91 and 1,281 is: 1,767.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.10 : 2,924.91 = 1,281 : x
  2. Step 2: Convert to fraction form
    2,120.10/2,924.91 = 1,281/x
  3. Step 3: Cross multiply
    2,120.10x = 2,924.91 × 1,281
  4. Step 4: Simplify right side
    2,120.10x = 3,746,809.71
  5. Step 5: Solve for x
    x = 3,746,809.71/2,120.10
  6. Step 6: Final answer
    x = 1,767.28

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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.