Home / 2,178.38-3,006.77-1,381.84

Finding the Fourth Proportional to 2,178.38, 3,006.77 and 1,381.84

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Solution

The fourth proportional to 2,178.38, 3,006.77 and 1,381.84 is: 1,907.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.38 : 3,006.77 = 1,381.84 : x
  2. Step 2: Convert to fraction form
    2,178.38/3,006.77 = 1,381.84/x
  3. Step 3: Cross multiply
    2,178.38x = 3,006.77 × 1,381.84
  4. Step 4: Simplify right side
    2,178.38x = 4,154,875.06
  5. Step 5: Solve for x
    x = 4,154,875.06/2,178.38
  6. Step 6: Final answer
    x = 1,907.32

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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.