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Finding the Fourth Proportional to 1,867.61, 2,799.74 and 771.27

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Solution

The fourth proportional to 1,867.61, 2,799.74 and 771.27 is: 1,156.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,867.61 : 2,799.74 = 771.27 : x
  2. Step 2: Convert to fraction form
    1,867.61/2,799.74 = 771.27/x
  3. Step 3: Cross multiply
    1,867.61x = 2,799.74 × 771.27
  4. Step 4: Simplify right side
    1,867.61x = 2,159,351.61
  5. Step 5: Solve for x
    x = 2,159,351.61/1,867.61
  6. Step 6: Final answer
    x = 1,156.21

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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.