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Finding the Fourth Proportional to 4,921.68, 7,382.48 and 2,840.35

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Solution

The fourth proportional to 4,921.68, 7,382.48 and 2,840.35 is: 4,260.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,921.68 : 7,382.48 = 2,840.35 : x
  2. Step 2: Convert to fraction form
    4,921.68/7,382.48 = 2,840.35/x
  3. Step 3: Cross multiply
    4,921.68x = 7,382.48 × 2,840.35
  4. Step 4: Simplify right side
    4,921.68x = 20,968,808.25
  5. Step 5: Solve for x
    x = 20,968,808.25/4,921.68
  6. Step 6: Final answer
    x = 4,260.50

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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.