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Finding the Fourth Proportional to 3,977.07, 5,488.86 and 2,405.16

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Solution

The fourth proportional to 3,977.07, 5,488.86 and 2,405.16 is: 3,319.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.07 : 5,488.86 = 2,405.16 : x
  2. Step 2: Convert to fraction form
    3,977.07/5,488.86 = 2,405.16/x
  3. Step 3: Cross multiply
    3,977.07x = 5,488.86 × 2,405.16
  4. Step 4: Simplify right side
    3,977.07x = 13,201,586.52
  5. Step 5: Solve for x
    x = 13,201,586.52/3,977.07
  6. Step 6: Final answer
    x = 3,319.43

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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.