Home / 2,072.90-2,860.65-1,128.74

Finding the Fourth Proportional to 2,072.90, 2,860.65 and 1,128.74

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Solution

The fourth proportional to 2,072.90, 2,860.65 and 1,128.74 is: 1,557.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.90 : 2,860.65 = 1,128.74 : x
  2. Step 2: Convert to fraction form
    2,072.90/2,860.65 = 1,128.74/x
  3. Step 3: Cross multiply
    2,072.90x = 2,860.65 × 1,128.74
  4. Step 4: Simplify right side
    2,072.90x = 3,228,930.08
  5. Step 5: Solve for x
    x = 3,228,930.08/2,072.90
  6. Step 6: Final answer
    x = 1,557.69

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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.