Home / 2,178.78-3,008.88-1,433.22

Finding the Fourth Proportional to 2,178.78, 3,008.88 and 1,433.22

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Solution

The fourth proportional to 2,178.78, 3,008.88 and 1,433.22 is: 1,979.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.78 : 3,008.88 = 1,433.22 : x
  2. Step 2: Convert to fraction form
    2,178.78/3,008.88 = 1,433.22/x
  3. Step 3: Cross multiply
    2,178.78x = 3,008.88 × 1,433.22
  4. Step 4: Simplify right side
    2,178.78x = 4,312,386.99
  5. Step 5: Solve for x
    x = 4,312,386.99/2,178.78
  6. Step 6: Final answer
    x = 1,979.27

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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.