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Finding the Fourth Proportional to 1,355.28, 2,032.39 and 553.64

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Solution

The fourth proportional to 1,355.28, 2,032.39 and 553.64 is: 830.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.28 : 2,032.39 = 553.64 : x
  2. Step 2: Convert to fraction form
    1,355.28/2,032.39 = 553.64/x
  3. Step 3: Cross multiply
    1,355.28x = 2,032.39 × 553.64
  4. Step 4: Simplify right side
    1,355.28x = 1,125,202.93
  5. Step 5: Solve for x
    x = 1,125,202.93/1,355.28
  6. Step 6: Final answer
    x = 830.24

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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.