Home / 2,783.16-4,172.58-1,320.12

Finding the Fourth Proportional to 2,783.16, 4,172.58 and 1,320.12

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Solution

The fourth proportional to 2,783.16, 4,172.58 and 1,320.12 is: 1,979.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.16 : 4,172.58 = 1,320.12 : x
  2. Step 2: Convert to fraction form
    2,783.16/4,172.58 = 1,320.12/x
  3. Step 3: Cross multiply
    2,783.16x = 4,172.58 × 1,320.12
  4. Step 4: Simplify right side
    2,783.16x = 5,508,306.31
  5. Step 5: Solve for x
    x = 5,508,306.31/2,783.16
  6. Step 6: Final answer
    x = 1,979.16

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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.