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Finding the Fourth Proportional to 744.21, 1,025.55 and 547.38

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Solution

The fourth proportional to 744.21, 1,025.55 and 547.38 is: 754.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.21 : 1,025.55 = 547.38 : x
  2. Step 2: Convert to fraction form
    744.21/1,025.55 = 547.38/x
  3. Step 3: Cross multiply
    744.21x = 1,025.55 × 547.38
  4. Step 4: Simplify right side
    744.21x = 561,365.56
  5. Step 5: Solve for x
    x = 561,365.56/744.21
  6. Step 6: Final answer
    x = 754.31

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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.