Home / 2,785.02-3,842.76-1,605.78

Finding the Fourth Proportional to 2,785.02, 3,842.76 and 1,605.78

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Solution

The fourth proportional to 2,785.02, 3,842.76 and 1,605.78 is: 2,215.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.02 : 3,842.76 = 1,605.78 : x
  2. Step 2: Convert to fraction form
    2,785.02/3,842.76 = 1,605.78/x
  3. Step 3: Cross multiply
    2,785.02x = 3,842.76 × 1,605.78
  4. Step 4: Simplify right side
    2,785.02x = 6,170,627.15
  5. Step 5: Solve for x
    x = 6,170,627.15/2,785.02
  6. Step 6: Final answer
    x = 2,215.65

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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.