Home / 2,178.63-3,006.18-1,382.40

Finding the Fourth Proportional to 2,178.63, 3,006.18 and 1,382.40

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Solution

The fourth proportional to 2,178.63, 3,006.18 and 1,382.40 is: 1,907.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.63 : 3,006.18 = 1,382.40 : x
  2. Step 2: Convert to fraction form
    2,178.63/3,006.18 = 1,382.40/x
  3. Step 3: Cross multiply
    2,178.63x = 3,006.18 × 1,382.40
  4. Step 4: Simplify right side
    2,178.63x = 4,155,743.23
  5. Step 5: Solve for x
    x = 4,155,743.23/2,178.63
  6. Step 6: Final answer
    x = 1,907.50

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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.