Home / 2,780.16-4,151.68-2,618.16

Finding the Fourth Proportional to 2,780.16, 4,151.68 and 2,618.16

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Solution

The fourth proportional to 2,780.16, 4,151.68 and 2,618.16 is: 3,909.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.16 : 4,151.68 = 2,618.16 : x
  2. Step 2: Convert to fraction form
    2,780.16/4,151.68 = 2,618.16/x
  3. Step 3: Cross multiply
    2,780.16x = 4,151.68 × 2,618.16
  4. Step 4: Simplify right side
    2,780.16x = 10,869,762.51
  5. Step 5: Solve for x
    x = 10,869,762.51/2,780.16
  6. Step 6: Final answer
    x = 3,909.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.