Home / 1,285.22-1,927.68-505.80

Finding the Fourth Proportional to 1,285.22, 1,927.68 and 505.80

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Solution

The fourth proportional to 1,285.22, 1,927.68 and 505.80 is: 758.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.22 : 1,927.68 = 505.80 : x
  2. Step 2: Convert to fraction form
    1,285.22/1,927.68 = 505.80/x
  3. Step 3: Cross multiply
    1,285.22x = 1,927.68 × 505.80
  4. Step 4: Simplify right side
    1,285.22x = 975,018.65
  5. Step 5: Solve for x
    x = 975,018.65/1,285.22
  6. Step 6: Final answer
    x = 758.64

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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.