Home / 3,889.70-5,365.40-2,490.02

Finding the Fourth Proportional to 3,889.70, 5,365.40 and 2,490.02

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Solution

The fourth proportional to 3,889.70, 5,365.40 and 2,490.02 is: 3,434.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.70 : 5,365.40 = 2,490.02 : x
  2. Step 2: Convert to fraction form
    3,889.70/5,365.40 = 2,490.02/x
  3. Step 3: Cross multiply
    3,889.70x = 5,365.40 × 2,490.02
  4. Step 4: Simplify right side
    3,889.70x = 13,359,953.31
  5. Step 5: Solve for x
    x = 13,359,953.31/3,889.70
  6. Step 6: Final answer
    x = 3,434.70

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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.