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Finding the Fourth Proportional to 933, 1,399.32 and 412.92

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Solution

The fourth proportional to 933, 1,399.32 and 412.92 is: 619.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    933 : 1,399.32 = 412.92 : x
  2. Step 2: Convert to fraction form
    933/1,399.32 = 412.92/x
  3. Step 3: Cross multiply
    933x = 1,399.32 × 412.92
  4. Step 4: Simplify right side
    933x = 577,807.21
  5. Step 5: Solve for x
    x = 577,807.21/933
  6. Step 6: Final answer
    x = 619.30

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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.