Home / 2,125.72-3,188.40-738.70

Finding the Fourth Proportional to 2,125.72, 3,188.40 and 738.70

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Solution

The fourth proportional to 2,125.72, 3,188.40 and 738.70 is: 1,107.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.72 : 3,188.40 = 738.70 : x
  2. Step 2: Convert to fraction form
    2,125.72/3,188.40 = 738.70/x
  3. Step 3: Cross multiply
    2,125.72x = 3,188.40 × 738.70
  4. Step 4: Simplify right side
    2,125.72x = 2,355,271.08
  5. Step 5: Solve for x
    x = 2,355,271.08/2,125.72
  6. Step 6: Final answer
    x = 1,107.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.