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Finding the Fourth Proportional to 1,323.84, 1,982.16 and 912.48

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Solution

The fourth proportional to 1,323.84, 1,982.16 and 912.48 is: 1,366.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.84 : 1,982.16 = 912.48 : x
  2. Step 2: Convert to fraction form
    1,323.84/1,982.16 = 912.48/x
  3. Step 3: Cross multiply
    1,323.84x = 1,982.16 × 912.48
  4. Step 4: Simplify right side
    1,323.84x = 1,808,681.36
  5. Step 5: Solve for x
    x = 1,808,681.36/1,323.84
  6. Step 6: Final answer
    x = 1,366.24

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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.