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Finding the Fourth Proportional to 3,328.83, 4,991.42 and 988.13

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Solution

The fourth proportional to 3,328.83, 4,991.42 and 988.13 is: 1,481.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,328.83 : 4,991.42 = 988.13 : x
  2. Step 2: Convert to fraction form
    3,328.83/4,991.42 = 988.13/x
  3. Step 3: Cross multiply
    3,328.83x = 4,991.42 × 988.13
  4. Step 4: Simplify right side
    3,328.83x = 4,932,186.79
  5. Step 5: Solve for x
    x = 4,932,186.79/3,328.83
  6. Step 6: Final answer
    x = 1,481.66

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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.