Home / 2,277.60-3,143.50-1,438.70

Finding the Fourth Proportional to 2,277.60, 3,143.50 and 1,438.70

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Solution

The fourth proportional to 2,277.60, 3,143.50 and 1,438.70 is: 1,985.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,277.60 : 3,143.50 = 1,438.70 : x
  2. Step 2: Convert to fraction form
    2,277.60/3,143.50 = 1,438.70/x
  3. Step 3: Cross multiply
    2,277.60x = 3,143.50 × 1,438.70
  4. Step 4: Simplify right side
    2,277.60x = 4,522,553.45
  5. Step 5: Solve for x
    x = 4,522,553.45/2,277.60
  6. Step 6: Final answer
    x = 1,985.67

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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.