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Finding the Fourth Proportional to 1,003.48, 1,504.86 and 386.86

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Solution

The fourth proportional to 1,003.48, 1,504.86 and 386.86 is: 580.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.48 : 1,504.86 = 386.86 : x
  2. Step 2: Convert to fraction form
    1,003.48/1,504.86 = 386.86/x
  3. Step 3: Cross multiply
    1,003.48x = 1,504.86 × 386.86
  4. Step 4: Simplify right side
    1,003.48x = 582,170.14
  5. Step 5: Solve for x
    x = 582,170.14/1,003.48
  6. Step 6: Final answer
    x = 580.15

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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.