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Finding the Fourth Proportional to 4,880.72, 7,319.88 and 1,919.12

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Solution

The fourth proportional to 4,880.72, 7,319.88 and 1,919.12 is: 2,878.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,880.72 : 7,319.88 = 1,919.12 : x
  2. Step 2: Convert to fraction form
    4,880.72/7,319.88 = 1,919.12/x
  3. Step 3: Cross multiply
    4,880.72x = 7,319.88 × 1,919.12
  4. Step 4: Simplify right side
    4,880.72x = 14,047,728.11
  5. Step 5: Solve for x
    x = 14,047,728.11/4,880.72
  6. Step 6: Final answer
    x = 2,878.21

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1.5x scale

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.