Home / 3,485.80-5,228.70-2,909.80

Finding the Fourth Proportional to 3,485.80, 5,228.70 and 2,909.80

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Solution

The fourth proportional to 3,485.80, 5,228.70 and 2,909.80 is: 4,364.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485.80 : 5,228.70 = 2,909.80 : x
  2. Step 2: Convert to fraction form
    3,485.80/5,228.70 = 2,909.80/x
  3. Step 3: Cross multiply
    3,485.80x = 5,228.70 × 2,909.80
  4. Step 4: Simplify right side
    3,485.80x = 15,214,471.26
  5. Step 5: Solve for x
    x = 15,214,471.26/3,485.80
  6. Step 6: Final answer
    x = 4,364.70

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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.