Home / 1,490.80-2,238.38-1,029.28

Finding the Fourth Proportional to 1,490.80, 2,238.38 and 1,029.28

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Solution

The fourth proportional to 1,490.80, 2,238.38 and 1,029.28 is: 1,545.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.80 : 2,238.38 = 1,029.28 : x
  2. Step 2: Convert to fraction form
    1,490.80/2,238.38 = 1,029.28/x
  3. Step 3: Cross multiply
    1,490.80x = 2,238.38 × 1,029.28
  4. Step 4: Simplify right side
    1,490.80x = 2,303,919.77
  5. Step 5: Solve for x
    x = 2,303,919.77/1,490.80
  6. Step 6: Final answer
    x = 1,545.43

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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.