Home / 2,087.08-3,130.95-990.84

Finding the Fourth Proportional to 2,087.08, 3,130.95 and 990.84

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Solution

The fourth proportional to 2,087.08, 3,130.95 and 990.84 is: 1,486.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.08 : 3,130.95 = 990.84 : x
  2. Step 2: Convert to fraction form
    2,087.08/3,130.95 = 990.84/x
  3. Step 3: Cross multiply
    2,087.08x = 3,130.95 × 990.84
  4. Step 4: Simplify right side
    2,087.08x = 3,102,265.54
  5. Step 5: Solve for x
    x = 3,102,265.54/2,087.08
  6. Step 6: Final answer
    x = 1,486.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.