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Finding the Fourth Proportional to 1,771.64, 2,658 and 906.56

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Solution

The fourth proportional to 1,771.64, 2,658 and 906.56 is: 1,360.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.64 : 2,658 = 906.56 : x
  2. Step 2: Convert to fraction form
    1,771.64/2,658 = 906.56/x
  3. Step 3: Cross multiply
    1,771.64x = 2,658 × 906.56
  4. Step 4: Simplify right side
    1,771.64x = 2,409,636.48
  5. Step 5: Solve for x
    x = 2,409,636.48/1,771.64
  6. Step 6: Final answer
    x = 1,360.12

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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.