Home / 1,423.40-2,137.05-730.60

Finding the Fourth Proportional to 1,423.40, 2,137.05 and 730.60

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Solution

The fourth proportional to 1,423.40, 2,137.05 and 730.60 is: 1,096.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.40 : 2,137.05 = 730.60 : x
  2. Step 2: Convert to fraction form
    1,423.40/2,137.05 = 730.60/x
  3. Step 3: Cross multiply
    1,423.40x = 2,137.05 × 730.60
  4. Step 4: Simplify right side
    1,423.40x = 1,561,323.39
  5. Step 5: Solve for x
    x = 1,561,323.39/1,423.40
  6. Step 6: Final answer
    x = 1,096.90

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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.