Home / 1,638.75-2,263.35-1,113.87

Finding the Fourth Proportional to 1,638.75, 2,263.35 and 1,113.87

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Solution

The fourth proportional to 1,638.75, 2,263.35 and 1,113.87 is: 1,538.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.75 : 2,263.35 = 1,113.87 : x
  2. Step 2: Convert to fraction form
    1,638.75/2,263.35 = 1,113.87/x
  3. Step 3: Cross multiply
    1,638.75x = 2,263.35 × 1,113.87
  4. Step 4: Simplify right side
    1,638.75x = 2,521,077.66
  5. Step 5: Solve for x
    x = 2,521,077.66/1,638.75
  6. Step 6: Final answer
    x = 1,538.42

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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.