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Finding the Fourth Proportional to 2,085.08, 3,127.95 and 786.65

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Solution

The fourth proportional to 2,085.08, 3,127.95 and 786.65 is: 1,180.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.08 : 3,127.95 = 786.65 : x
  2. Step 2: Convert to fraction form
    2,085.08/3,127.95 = 786.65/x
  3. Step 3: Cross multiply
    2,085.08x = 3,127.95 × 786.65
  4. Step 4: Simplify right side
    2,085.08x = 2,460,586.23
  5. Step 5: Solve for x
    x = 2,460,586.23/2,085.08
  6. Step 6: Final answer
    x = 1,180.09

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1.5x scale

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.