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Finding the Fourth Proportional to 3,812.58, 5,716.58 and 1,312.86

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Solution

The fourth proportional to 3,812.58, 5,716.58 and 1,312.86 is: 1,968.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,812.58 : 5,716.58 = 1,312.86 : x
  2. Step 2: Convert to fraction form
    3,812.58/5,716.58 = 1,312.86/x
  3. Step 3: Cross multiply
    3,812.58x = 5,716.58 × 1,312.86
  4. Step 4: Simplify right side
    3,812.58x = 7,505,069.22
  5. Step 5: Solve for x
    x = 7,505,069.22/3,812.58
  6. Step 6: Final answer
    x = 1,968.50

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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.