Home / 2,785.40-4,178.64-837.56

Finding the Fourth Proportional to 2,785.40, 4,178.64 and 837.56

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Solution

The fourth proportional to 2,785.40, 4,178.64 and 837.56 is: 1,256.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.40 : 4,178.64 = 837.56 : x
  2. Step 2: Convert to fraction form
    2,785.40/4,178.64 = 837.56/x
  3. Step 3: Cross multiply
    2,785.40x = 4,178.64 × 837.56
  4. Step 4: Simplify right side
    2,785.40x = 3,499,861.72
  5. Step 5: Solve for x
    x = 3,499,861.72/2,785.40
  6. Step 6: Final answer
    x = 1,256.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.