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Finding the Fourth Proportional to 4,704.80, 7,059.90 and 1,785.20

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Solution

The fourth proportional to 4,704.80, 7,059.90 and 1,785.20 is: 2,678.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,704.80 : 7,059.90 = 1,785.20 : x
  2. Step 2: Convert to fraction form
    4,704.80/7,059.90 = 1,785.20/x
  3. Step 3: Cross multiply
    4,704.80x = 7,059.90 × 1,785.20
  4. Step 4: Simplify right side
    4,704.80x = 12,603,333.48
  5. Step 5: Solve for x
    x = 12,603,333.48/4,704.80
  6. Step 6: Final answer
    x = 2,678.82

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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.