Home / 3,897.17-5,376.34-2,405.15

Finding the Fourth Proportional to 3,897.17, 5,376.34 and 2,405.15

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Solution

The fourth proportional to 3,897.17, 5,376.34 and 2,405.15 is: 3,318.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897.17 : 5,376.34 = 2,405.15 : x
  2. Step 2: Convert to fraction form
    3,897.17/5,376.34 = 2,405.15/x
  3. Step 3: Cross multiply
    3,897.17x = 5,376.34 × 2,405.15
  4. Step 4: Simplify right side
    3,897.17x = 12,930,904.15
  5. Step 5: Solve for x
    x = 12,930,904.15/3,897.17
  6. Step 6: Final answer
    x = 3,318.02

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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.