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Finding the Fourth Proportional to 1,683.50, 2,524.59 and 990.34

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Solution

The fourth proportional to 1,683.50, 2,524.59 and 990.34 is: 1,485.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,683.50 : 2,524.59 = 990.34 : x
  2. Step 2: Convert to fraction form
    1,683.50/2,524.59 = 990.34/x
  3. Step 3: Cross multiply
    1,683.50x = 2,524.59 × 990.34
  4. Step 4: Simplify right side
    1,683.50x = 2,500,202.46
  5. Step 5: Solve for x
    x = 2,500,202.46/1,683.50
  6. Step 6: Final answer
    x = 1,485.12

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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.