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Finding the Fourth Proportional to 933.22, 1,399.35 and 385.52

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Solution

The fourth proportional to 933.22, 1,399.35 and 385.52 is: 578.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.22 : 1,399.35 = 385.52 : x
  2. Step 2: Convert to fraction form
    933.22/1,399.35 = 385.52/x
  3. Step 3: Cross multiply
    933.22x = 1,399.35 × 385.52
  4. Step 4: Simplify right side
    933.22x = 539,477.41
  5. Step 5: Solve for x
    x = 539,477.41/933.22
  6. Step 6: Final answer
    x = 578.08

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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.