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Finding the Fourth Proportional to 1,771.76, 2,444.99 and 985.79

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Solution

The fourth proportional to 1,771.76, 2,444.99 and 985.79 is: 1,360.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.76 : 2,444.99 = 985.79 : x
  2. Step 2: Convert to fraction form
    1,771.76/2,444.99 = 985.79/x
  3. Step 3: Cross multiply
    1,771.76x = 2,444.99 × 985.79
  4. Step 4: Simplify right side
    1,771.76x = 2,410,247.88
  5. Step 5: Solve for x
    x = 2,410,247.88/1,771.76
  6. Step 6: Final answer
    x = 1,360.37

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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.