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Finding the Fourth Proportional to 3,485.70, 5,203.80 and 3,339.90

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Solution

The fourth proportional to 3,485.70, 5,203.80 and 3,339.90 is: 4,986.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485.70 : 5,203.80 = 3,339.90 : x
  2. Step 2: Convert to fraction form
    3,485.70/5,203.80 = 3,339.90/x
  3. Step 3: Cross multiply
    3,485.70x = 5,203.80 × 3,339.90
  4. Step 4: Simplify right side
    3,485.70x = 17,380,171.62
  5. Step 5: Solve for x
    x = 17,380,171.62/3,485.70
  6. Step 6: Final answer
    x = 4,986.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.