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Finding the Fourth Proportional to 2,937.76, 4,054.80 and 1,890.88

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Solution

The fourth proportional to 2,937.76, 4,054.80 and 1,890.88 is: 2,609.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,937.76 : 4,054.80 = 1,890.88 : x
  2. Step 2: Convert to fraction form
    2,937.76/4,054.80 = 1,890.88/x
  3. Step 3: Cross multiply
    2,937.76x = 4,054.80 × 1,890.88
  4. Step 4: Simplify right side
    2,937.76x = 7,667,140.22
  5. Step 5: Solve for x
    x = 7,667,140.22/2,937.76
  6. Step 6: Final answer
    x = 2,609.86

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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.