Home / 1,621.85-2,238.22-913.98

Finding the Fourth Proportional to 1,621.85, 2,238.22 and 913.98

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Solution

The fourth proportional to 1,621.85, 2,238.22 and 913.98 is: 1,261.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.85 : 2,238.22 = 913.98 : x
  2. Step 2: Convert to fraction form
    1,621.85/2,238.22 = 913.98/x
  3. Step 3: Cross multiply
    1,621.85x = 2,238.22 × 913.98
  4. Step 4: Simplify right side
    1,621.85x = 2,045,672.55
  5. Step 5: Solve for x
    x = 2,045,672.55/1,621.85
  6. Step 6: Final answer
    x = 1,261.32

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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.