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Finding the Fourth Proportional to 2,084.54, 3,125.85 and 785.18

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Solution

The fourth proportional to 2,084.54, 3,125.85 and 785.18 is: 1,177.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,084.54 : 3,125.85 = 785.18 : x
  2. Step 2: Convert to fraction form
    2,084.54/3,125.85 = 785.18/x
  3. Step 3: Cross multiply
    2,084.54x = 3,125.85 × 785.18
  4. Step 4: Simplify right side
    2,084.54x = 2,454,354.90
  5. Step 5: Solve for x
    x = 2,454,354.90/2,084.54
  6. Step 6: Final answer
    x = 1,177.41

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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.