Home / 1,378.18-1,900.92-1,293.22

Finding the Fourth Proportional to 1,378.18, 1,900.92 and 1,293.22

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Solution

The fourth proportional to 1,378.18, 1,900.92 and 1,293.22 is: 1,783.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.18 : 1,900.92 = 1,293.22 : x
  2. Step 2: Convert to fraction form
    1,378.18/1,900.92 = 1,293.22/x
  3. Step 3: Cross multiply
    1,378.18x = 1,900.92 × 1,293.22
  4. Step 4: Simplify right side
    1,378.18x = 2,458,307.76
  5. Step 5: Solve for x
    x = 2,458,307.76/1,378.18
  6. Step 6: Final answer
    x = 1,783.73

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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.