Home / 1,285.70-1,927.80-1,131.93

Finding the Fourth Proportional to 1,285.70, 1,927.80 and 1,131.93

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Solution

The fourth proportional to 1,285.70, 1,927.80 and 1,131.93 is: 1,697.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.70 : 1,927.80 = 1,131.93 : x
  2. Step 2: Convert to fraction form
    1,285.70/1,927.80 = 1,131.93/x
  3. Step 3: Cross multiply
    1,285.70x = 1,927.80 × 1,131.93
  4. Step 4: Simplify right side
    1,285.70x = 2,182,134.65
  5. Step 5: Solve for x
    x = 2,182,134.65/1,285.70
  6. Step 6: Final answer
    x = 1,697.24

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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.