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Finding the Fourth Proportional to 1,254.22, 1,730.36 and 812.37

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Solution

The fourth proportional to 1,254.22, 1,730.36 and 812.37 is: 1,120.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.22 : 1,730.36 = 812.37 : x
  2. Step 2: Convert to fraction form
    1,254.22/1,730.36 = 812.37/x
  3. Step 3: Cross multiply
    1,254.22x = 1,730.36 × 812.37
  4. Step 4: Simplify right side
    1,254.22x = 1,405,688.23
  5. Step 5: Solve for x
    x = 1,405,688.23/1,254.22
  6. Step 6: Final answer
    x = 1,120.76

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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.