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Finding the Fourth Proportional to 2,011.95, 2,775.13 and 1,638.95

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Solution

The fourth proportional to 2,011.95, 2,775.13 and 1,638.95 is: 2,260.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.95 : 2,775.13 = 1,638.95 : x
  2. Step 2: Convert to fraction form
    2,011.95/2,775.13 = 1,638.95/x
  3. Step 3: Cross multiply
    2,011.95x = 2,775.13 × 1,638.95
  4. Step 4: Simplify right side
    2,011.95x = 4,548,281.34
  5. Step 5: Solve for x
    x = 4,548,281.34/2,011.95
  6. Step 6: Final answer
    x = 2,260.63

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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.