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Finding the Fourth Proportional to 2,413.90, 3,621.35 and 770.57

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Solution

The fourth proportional to 2,413.90, 3,621.35 and 770.57 is: 1,156.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,413.90 : 3,621.35 = 770.57 : x
  2. Step 2: Convert to fraction form
    2,413.90/3,621.35 = 770.57/x
  3. Step 3: Cross multiply
    2,413.90x = 3,621.35 × 770.57
  4. Step 4: Simplify right side
    2,413.90x = 2,790,503.67
  5. Step 5: Solve for x
    x = 2,790,503.67/2,413.90
  6. Step 6: Final answer
    x = 1,156.01

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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.