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Finding the Fourth Proportional to 3,808.53, 5,712.91 and 1,345.05

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Solution

The fourth proportional to 3,808.53, 5,712.91 and 1,345.05 is: 2,017.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,808.53 : 5,712.91 = 1,345.05 : x
  2. Step 2: Convert to fraction form
    3,808.53/5,712.91 = 1,345.05/x
  3. Step 3: Cross multiply
    3,808.53x = 5,712.91 × 1,345.05
  4. Step 4: Simplify right side
    3,808.53x = 7,684,146.23
  5. Step 5: Solve for x
    x = 7,684,146.23/3,808.53
  6. Step 6: Final answer
    x = 2,017.61

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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.