Home / 2,785.58-4,178.40-1,140.98

Finding the Fourth Proportional to 2,785.58, 4,178.40 and 1,140.98

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Solution

The fourth proportional to 2,785.58, 4,178.40 and 1,140.98 is: 1,711.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.58 : 4,178.40 = 1,140.98 : x
  2. Step 2: Convert to fraction form
    2,785.58/4,178.40 = 1,140.98/x
  3. Step 3: Cross multiply
    2,785.58x = 4,178.40 × 1,140.98
  4. Step 4: Simplify right side
    2,785.58x = 4,767,470.83
  5. Step 5: Solve for x
    x = 4,767,470.83/2,785.58
  6. Step 6: Final answer
    x = 1,711.48

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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.