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Finding the Fourth Proportional to 1,323, 1,984.86 and 553.56

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Solution

The fourth proportional to 1,323, 1,984.86 and 553.56 is: 830.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323 : 1,984.86 = 553.56 : x
  2. Step 2: Convert to fraction form
    1,323/1,984.86 = 553.56/x
  3. Step 3: Cross multiply
    1,323x = 1,984.86 × 553.56
  4. Step 4: Simplify right side
    1,323x = 1,098,739.10
  5. Step 5: Solve for x
    x = 1,098,739.10/1,323
  6. Step 6: Final answer
    x = 830.49

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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.