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Finding the Fourth Proportional to 1,245.36, 1,717.49 and 982.92

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Solution

The fourth proportional to 1,245.36, 1,717.49 and 982.92 is: 1,355.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.36 : 1,717.49 = 982.92 : x
  2. Step 2: Convert to fraction form
    1,245.36/1,717.49 = 982.92/x
  3. Step 3: Cross multiply
    1,245.36x = 1,717.49 × 982.92
  4. Step 4: Simplify right side
    1,245.36x = 1,688,155.27
  5. Step 5: Solve for x
    x = 1,688,155.27/1,245.36
  6. Step 6: Final answer
    x = 1,355.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.