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Finding the Fourth Proportional to 4,880.70, 7,321.05 and 2,807.10

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Solution

The fourth proportional to 4,880.70, 7,321.05 and 2,807.10 is: 4,210.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,880.70 : 7,321.05 = 2,807.10 : x
  2. Step 2: Convert to fraction form
    4,880.70/7,321.05 = 2,807.10/x
  3. Step 3: Cross multiply
    4,880.70x = 7,321.05 × 2,807.10
  4. Step 4: Simplify right side
    4,880.70x = 20,550,919.46
  5. Step 5: Solve for x
    x = 20,550,919.46/4,880.70
  6. Step 6: Final answer
    x = 4,210.65

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Half scale
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Double scale
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Similar ratio
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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.