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Finding the Fourth Proportional to 3,485.54, 4,809.89 and 1,913.53

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Solution

The fourth proportional to 3,485.54, 4,809.89 and 1,913.53 is: 2,640.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485.54 : 4,809.89 = 1,913.53 : x
  2. Step 2: Convert to fraction form
    3,485.54/4,809.89 = 1,913.53/x
  3. Step 3: Cross multiply
    3,485.54x = 4,809.89 × 1,913.53
  4. Step 4: Simplify right side
    3,485.54x = 9,203,861.57
  5. Step 5: Solve for x
    x = 9,203,861.57/3,485.54
  6. Step 6: Final answer
    x = 2,640.59

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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.