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Finding the Fourth Proportional to 1,413.78, 2,120.77 and 373.77

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Solution

The fourth proportional to 1,413.78, 2,120.77 and 373.77 is: 560.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.78 : 2,120.77 = 373.77 : x
  2. Step 2: Convert to fraction form
    1,413.78/2,120.77 = 373.77/x
  3. Step 3: Cross multiply
    1,413.78x = 2,120.77 × 373.77
  4. Step 4: Simplify right side
    1,413.78x = 792,685.50
  5. Step 5: Solve for x
    x = 792,685.50/1,413.78
  6. Step 6: Final answer
    x = 560.69

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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.