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Finding the Fourth Proportional to 2,880.38, 4,320.34 and 771.84

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Solution

The fourth proportional to 2,880.38, 4,320.34 and 771.84 is: 1,157.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.38 : 4,320.34 = 771.84 : x
  2. Step 2: Convert to fraction form
    2,880.38/4,320.34 = 771.84/x
  3. Step 3: Cross multiply
    2,880.38x = 4,320.34 × 771.84
  4. Step 4: Simplify right side
    2,880.38x = 3,334,611.23
  5. Step 5: Solve for x
    x = 3,334,611.23/2,880.38
  6. Step 6: Final answer
    x = 1,157.70

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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.