Home / 1,429.24-2,143.86-389.24

Finding the Fourth Proportional to 1,429.24, 2,143.86 and 389.24

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Solution

The fourth proportional to 1,429.24, 2,143.86 and 389.24 is: 583.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.24 : 2,143.86 = 389.24 : x
  2. Step 2: Convert to fraction form
    1,429.24/2,143.86 = 389.24/x
  3. Step 3: Cross multiply
    1,429.24x = 2,143.86 × 389.24
  4. Step 4: Simplify right side
    1,429.24x = 834,482.89
  5. Step 5: Solve for x
    x = 834,482.89/1,429.24
  6. Step 6: Final answer
    x = 583.87

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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.