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Finding the Fourth Proportional to 5,640.66, 8,460.99 and 2,560.50

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Solution

The fourth proportional to 5,640.66, 8,460.99 and 2,560.50 is: 3,840.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.66 : 8,460.99 = 2,560.50 : x
  2. Step 2: Convert to fraction form
    5,640.66/8,460.99 = 2,560.50/x
  3. Step 3: Cross multiply
    5,640.66x = 8,460.99 × 2,560.50
  4. Step 4: Simplify right side
    5,640.66x = 21,664,364.90
  5. Step 5: Solve for x
    x = 21,664,364.90/5,640.66
  6. Step 6: Final answer
    x = 3,840.75

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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.