Home / 2,851.55-4,278.70-1,389.91

Finding the Fourth Proportional to 2,851.55, 4,278.70 and 1,389.91

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Solution

The fourth proportional to 2,851.55, 4,278.70 and 1,389.91 is: 2,085.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,851.55 : 4,278.70 = 1,389.91 : x
  2. Step 2: Convert to fraction form
    2,851.55/4,278.70 = 1,389.91/x
  3. Step 3: Cross multiply
    2,851.55x = 4,278.70 × 1,389.91
  4. Step 4: Simplify right side
    2,851.55x = 5,946,990.27
  5. Step 5: Solve for x
    x = 5,946,990.27/2,851.55
  6. Step 6: Final answer
    x = 2,085.53

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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.