Home / 2,007.95-2,771.28-1,221.99

Finding the Fourth Proportional to 2,007.95, 2,771.28 and 1,221.99

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Solution

The fourth proportional to 2,007.95, 2,771.28 and 1,221.99 is: 1,686.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,007.95 : 2,771.28 = 1,221.99 : x
  2. Step 2: Convert to fraction form
    2,007.95/2,771.28 = 1,221.99/x
  3. Step 3: Cross multiply
    2,007.95x = 2,771.28 × 1,221.99
  4. Step 4: Simplify right side
    2,007.95x = 3,386,476.45
  5. Step 5: Solve for x
    x = 3,386,476.45/2,007.95
  6. Step 6: Final answer
    x = 1,686.54

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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.