Home / 2,790.90-3,851.76-1,672.20

Finding the Fourth Proportional to 2,790.90, 3,851.76 and 1,672.20

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Solution

The fourth proportional to 2,790.90, 3,851.76 and 1,672.20 is: 2,307.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.90 : 3,851.76 = 1,672.20 : x
  2. Step 2: Convert to fraction form
    2,790.90/3,851.76 = 1,672.20/x
  3. Step 3: Cross multiply
    2,790.90x = 3,851.76 × 1,672.20
  4. Step 4: Simplify right side
    2,790.90x = 6,440,913.07
  5. Step 5: Solve for x
    x = 6,440,913.07/2,790.90
  6. Step 6: Final answer
    x = 2,307.83

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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.