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Finding the Fourth Proportional to 933.70, 1,400.34 and 413.56

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Solution

The fourth proportional to 933.70, 1,400.34 and 413.56 is: 620.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.70 : 1,400.34 = 413.56 : x
  2. Step 2: Convert to fraction form
    933.70/1,400.34 = 413.56/x
  3. Step 3: Cross multiply
    933.70x = 1,400.34 × 413.56
  4. Step 4: Simplify right side
    933.70x = 579,124.61
  5. Step 5: Solve for x
    x = 579,124.61/933.70
  6. Step 6: Final answer
    x = 620.25

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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.