Home / 2,178.61-3,006.64-1,282.40

Finding the Fourth Proportional to 2,178.61, 3,006.64 and 1,282.40

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Solution

The fourth proportional to 2,178.61, 3,006.64 and 1,282.40 is: 1,769.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.61 : 3,006.64 = 1,282.40 : x
  2. Step 2: Convert to fraction form
    2,178.61/3,006.64 = 1,282.40/x
  3. Step 3: Cross multiply
    2,178.61x = 3,006.64 × 1,282.40
  4. Step 4: Simplify right side
    2,178.61x = 3,855,716.59
  5. Step 5: Solve for x
    x = 3,855,716.59/2,178.61
  6. Step 6: Final answer
    x = 1,769.80

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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.