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Finding the Fourth Proportional to 3,889.92, 5,368.08 and 2,318.16

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Solution

The fourth proportional to 3,889.92, 5,368.08 and 2,318.16 is: 3,199.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.92 : 5,368.08 = 2,318.16 : x
  2. Step 2: Convert to fraction form
    3,889.92/5,368.08 = 2,318.16/x
  3. Step 3: Cross multiply
    3,889.92x = 5,368.08 × 2,318.16
  4. Step 4: Simplify right side
    3,889.92x = 12,444,068.33
  5. Step 5: Solve for x
    x = 12,444,068.33/3,889.92
  6. Step 6: Final answer
    x = 3,199.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.