Home / 2,686.64-4,031.10-1,389.02

Finding the Fourth Proportional to 2,686.64, 4,031.10 and 1,389.02

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Solution

The fourth proportional to 2,686.64, 4,031.10 and 1,389.02 is: 2,084.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.64 : 4,031.10 = 1,389.02 : x
  2. Step 2: Convert to fraction form
    2,686.64/4,031.10 = 1,389.02/x
  3. Step 3: Cross multiply
    2,686.64x = 4,031.10 × 1,389.02
  4. Step 4: Simplify right side
    2,686.64x = 5,599,258.37
  5. Step 5: Solve for x
    x = 5,599,258.37/2,686.64
  6. Step 6: Final answer
    x = 2,084.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.