Home / 1,785.20-2,458.23-1,389.92

Finding the Fourth Proportional to 1,785.20, 2,458.23 and 1,389.92

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Solution

The fourth proportional to 1,785.20, 2,458.23 and 1,389.92 is: 1,913.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.20 : 2,458.23 = 1,389.92 : x
  2. Step 2: Convert to fraction form
    1,785.20/2,458.23 = 1,389.92/x
  3. Step 3: Cross multiply
    1,785.20x = 2,458.23 × 1,389.92
  4. Step 4: Simplify right side
    1,785.20x = 3,416,743.04
  5. Step 5: Solve for x
    x = 3,416,743.04/1,785.20
  6. Step 6: Final answer
    x = 1,913.93

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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.