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Finding the Fourth Proportional to 5,759.64, 8,640 and 3,465.72

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Solution

The fourth proportional to 5,759.64, 8,640 and 3,465.72 is: 5,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,759.64 : 8,640 = 3,465.72 : x
  2. Step 2: Convert to fraction form
    5,759.64/8,640 = 3,465.72/x
  3. Step 3: Cross multiply
    5,759.64x = 8,640 × 3,465.72
  4. Step 4: Simplify right side
    5,759.64x = 29,943,820.80
  5. Step 5: Solve for x
    x = 29,943,820.80/5,759.64
  6. Step 6: Final answer
    x = 5,198.90

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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.