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Finding the Fourth Proportional to 2,800.03, 4,200 and 720.02

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Solution

The fourth proportional to 2,800.03, 4,200 and 720.02 is: 1,080.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.03 : 4,200 = 720.02 : x
  2. Step 2: Convert to fraction form
    2,800.03/4,200 = 720.02/x
  3. Step 3: Cross multiply
    2,800.03x = 4,200 × 720.02
  4. Step 4: Simplify right side
    2,800.03x = 3,024,084
  5. Step 5: Solve for x
    x = 3,024,084/2,800.03
  6. Step 6: Final answer
    x = 1,080.02

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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.