Home / 1,205.30-1,806.86-424.83

Finding the Fourth Proportional to 1,205.30, 1,806.86 and 424.83

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Solution

The fourth proportional to 1,205.30, 1,806.86 and 424.83 is: 636.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.30 : 1,806.86 = 424.83 : x
  2. Step 2: Convert to fraction form
    1,205.30/1,806.86 = 424.83/x
  3. Step 3: Cross multiply
    1,205.30x = 1,806.86 × 424.83
  4. Step 4: Simplify right side
    1,205.30x = 767,606.21
  5. Step 5: Solve for x
    x = 767,606.21/1,205.30
  6. Step 6: Final answer
    x = 636.86

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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.