Home / 2,809.62-4,210.79-1,247.40

Finding the Fourth Proportional to 2,809.62, 4,210.79 and 1,247.40

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Solution

The fourth proportional to 2,809.62, 4,210.79 and 1,247.40 is: 1,869.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,809.62 : 4,210.79 = 1,247.40 : x
  2. Step 2: Convert to fraction form
    2,809.62/4,210.79 = 1,247.40/x
  3. Step 3: Cross multiply
    2,809.62x = 4,210.79 × 1,247.40
  4. Step 4: Simplify right side
    2,809.62x = 5,252,533.21
  5. Step 5: Solve for x
    x = 5,252,533.21/2,809.62
  6. Step 6: Final answer
    x = 1,869.48

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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.