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Finding the Fourth Proportional to 933, 1,399.34 and 355.72

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Solution

The fourth proportional to 933, 1,399.34 and 355.72 is: 533.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    933 : 1,399.34 = 355.72 : x
  2. Step 2: Convert to fraction form
    933/1,399.34 = 355.72/x
  3. Step 3: Cross multiply
    933x = 1,399.34 × 355.72
  4. Step 4: Simplify right side
    933x = 497,773.22
  5. Step 5: Solve for x
    x = 497,773.22/933
  6. Step 6: Final answer
    x = 533.52

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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.