Home / 1,424.20-2,135.49-730.30

Finding the Fourth Proportional to 1,424.20, 2,135.49 and 730.30

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Solution

The fourth proportional to 1,424.20, 2,135.49 and 730.30 is: 1,095.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.20 : 2,135.49 = 730.30 : x
  2. Step 2: Convert to fraction form
    1,424.20/2,135.49 = 730.30/x
  3. Step 3: Cross multiply
    1,424.20x = 2,135.49 × 730.30
  4. Step 4: Simplify right side
    1,424.20x = 1,559,548.35
  5. Step 5: Solve for x
    x = 1,559,548.35/1,424.20
  6. Step 6: Final answer
    x = 1,095.03

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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.