Home / 1,384.20-2,076.30-1,259.40

Finding the Fourth Proportional to 1,384.20, 2,076.30 and 1,259.40

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Solution

The fourth proportional to 1,384.20, 2,076.30 and 1,259.40 is: 1,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.20 : 2,076.30 = 1,259.40 : x
  2. Step 2: Convert to fraction form
    1,384.20/2,076.30 = 1,259.40/x
  3. Step 3: Cross multiply
    1,384.20x = 2,076.30 × 1,259.40
  4. Step 4: Simplify right side
    1,384.20x = 2,614,892.22
  5. Step 5: Solve for x
    x = 2,614,892.22/1,384.20
  6. Step 6: Final answer
    x = 1,889.10

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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.