Home / 1,423.36-2,138.28-1,115.68

Finding the Fourth Proportional to 1,423.36, 2,138.28 and 1,115.68

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Solution

The fourth proportional to 1,423.36, 2,138.28 and 1,115.68 is: 1,676.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.36 : 2,138.28 = 1,115.68 : x
  2. Step 2: Convert to fraction form
    1,423.36/2,138.28 = 1,115.68/x
  3. Step 3: Cross multiply
    1,423.36x = 2,138.28 × 1,115.68
  4. Step 4: Simplify right side
    1,423.36x = 2,385,636.23
  5. Step 5: Solve for x
    x = 2,385,636.23/1,423.36
  6. Step 6: Final answer
    x = 1,676.06

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1.5x scale

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.