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Finding the Fourth Proportional to 1,355.42, 2,033.28 and 477.92

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Solution

The fourth proportional to 1,355.42, 2,033.28 and 477.92 is: 716.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.42 : 2,033.28 = 477.92 : x
  2. Step 2: Convert to fraction form
    1,355.42/2,033.28 = 477.92/x
  3. Step 3: Cross multiply
    1,355.42x = 2,033.28 × 477.92
  4. Step 4: Simplify right side
    1,355.42x = 971,745.18
  5. Step 5: Solve for x
    x = 971,745.18/1,355.42
  6. Step 6: Final answer
    x = 716.93

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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.