Home / 1,783.38-2,461.62-1,120.80

Finding the Fourth Proportional to 1,783.38, 2,461.62 and 1,120.80

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Solution

The fourth proportional to 1,783.38, 2,461.62 and 1,120.80 is: 1,547.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.38 : 2,461.62 = 1,120.80 : x
  2. Step 2: Convert to fraction form
    1,783.38/2,461.62 = 1,120.80/x
  3. Step 3: Cross multiply
    1,783.38x = 2,461.62 × 1,120.80
  4. Step 4: Simplify right side
    1,783.38x = 2,758,997.13
  5. Step 5: Solve for x
    x = 2,758,997.13/1,783.38
  6. Step 6: Final answer
    x = 1,547.06

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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.