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Finding the Fourth Proportional to 1,333.08, 2,007.36 and 988.86

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Solution

The fourth proportional to 1,333.08, 2,007.36 and 988.86 is: 1,489.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.08 : 2,007.36 = 988.86 : x
  2. Step 2: Convert to fraction form
    1,333.08/2,007.36 = 988.86/x
  3. Step 3: Cross multiply
    1,333.08x = 2,007.36 × 988.86
  4. Step 4: Simplify right side
    1,333.08x = 1,984,998.01
  5. Step 5: Solve for x
    x = 1,984,998.01/1,333.08
  6. Step 6: Final answer
    x = 1,489.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.