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Finding the Fourth Proportional to 1,647.12, 2,274.16 and 1,256.16

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Solution

The fourth proportional to 1,647.12, 2,274.16 and 1,256.16 is: 1,734.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,647.12 : 2,274.16 = 1,256.16 : x
  2. Step 2: Convert to fraction form
    1,647.12/2,274.16 = 1,256.16/x
  3. Step 3: Cross multiply
    1,647.12x = 2,274.16 × 1,256.16
  4. Step 4: Simplify right side
    1,647.12x = 2,856,708.83
  5. Step 5: Solve for x
    x = 2,856,708.83/1,647.12
  6. Step 6: Final answer
    x = 1,734.37

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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.