Home / 2,880.11-3,974.87-1,621.47

Finding the Fourth Proportional to 2,880.11, 3,974.87 and 1,621.47

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Solution

The fourth proportional to 2,880.11, 3,974.87 and 1,621.47 is: 2,237.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.11 : 3,974.87 = 1,621.47 : x
  2. Step 2: Convert to fraction form
    2,880.11/3,974.87 = 1,621.47/x
  3. Step 3: Cross multiply
    2,880.11x = 3,974.87 × 1,621.47
  4. Step 4: Simplify right side
    2,880.11x = 6,445,136.51
  5. Step 5: Solve for x
    x = 6,445,136.51/2,880.11
  6. Step 6: Final answer
    x = 2,237.81

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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.