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Finding the Fourth Proportional to 2,938.64, 4,056.00 and 1,888.88

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Solution

The fourth proportional to 2,938.64, 4,056.00 and 1,888.88 is: 2,607.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,938.64 : 4,056.00 = 1,888.88 : x
  2. Step 2: Convert to fraction form
    2,938.64/4,056.00 = 1,888.88/x
  3. Step 3: Cross multiply
    2,938.64x = 4,056.00 × 1,888.88
  4. Step 4: Simplify right side
    2,938.64x = 7,661,302.00
  5. Step 5: Solve for x
    x = 7,661,302.00/2,938.64
  6. Step 6: Final answer
    x = 2,607.09

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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.