Home / 2,087.77-2,880.40-1,190.86

Finding the Fourth Proportional to 2,087.77, 2,880.40 and 1,190.86

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Solution

The fourth proportional to 2,087.77, 2,880.40 and 1,190.86 is: 1,642.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.77 : 2,880.40 = 1,190.86 : x
  2. Step 2: Convert to fraction form
    2,087.77/2,880.40 = 1,190.86/x
  3. Step 3: Cross multiply
    2,087.77x = 2,880.40 × 1,190.86
  4. Step 4: Simplify right side
    2,087.77x = 3,430,153.14
  5. Step 5: Solve for x
    x = 3,430,153.14/2,087.77
  6. Step 6: Final answer
    x = 1,642.98

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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.