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Finding the Fourth Proportional to 3,670.86, 5,505.48 and 1,330.50

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Solution

The fourth proportional to 3,670.86, 5,505.48 and 1,330.50 is: 1,995.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,670.86 : 5,505.48 = 1,330.50 : x
  2. Step 2: Convert to fraction form
    3,670.86/5,505.48 = 1,330.50/x
  3. Step 3: Cross multiply
    3,670.86x = 5,505.48 × 1,330.50
  4. Step 4: Simplify right side
    3,670.86x = 7,325,041.14
  5. Step 5: Solve for x
    x = 7,325,041.14/3,670.86
  6. Step 6: Final answer
    x = 1,995.46

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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.