Home / 2,749.60-4,124.80-900.40

Finding the Fourth Proportional to 2,749.60, 4,124.80 and 900.40

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Solution

The fourth proportional to 2,749.60, 4,124.80 and 900.40 is: 1,350.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,749.60 : 4,124.80 = 900.40 : x
  2. Step 2: Convert to fraction form
    2,749.60/4,124.80 = 900.40/x
  3. Step 3: Cross multiply
    2,749.60x = 4,124.80 × 900.40
  4. Step 4: Simplify right side
    2,749.60x = 3,713,969.92
  5. Step 5: Solve for x
    x = 3,713,969.92/2,749.60
  6. Step 6: Final answer
    x = 1,350.73

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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.