Home / 1,878.70-2,591.55-1,178.86

Finding the Fourth Proportional to 1,878.70, 2,591.55 and 1,178.86

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Solution

The fourth proportional to 1,878.70, 2,591.55 and 1,178.86 is: 1,626.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.70 : 2,591.55 = 1,178.86 : x
  2. Step 2: Convert to fraction form
    1,878.70/2,591.55 = 1,178.86/x
  3. Step 3: Cross multiply
    1,878.70x = 2,591.55 × 1,178.86
  4. Step 4: Simplify right side
    1,878.70x = 3,055,074.63
  5. Step 5: Solve for x
    x = 3,055,074.63/1,878.70
  6. Step 6: Final answer
    x = 1,626.16

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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.