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Finding the Fourth Proportional to 739.55, 1,109.37 and 277.45

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Solution

The fourth proportional to 739.55, 1,109.37 and 277.45 is: 416.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.55 : 1,109.37 = 277.45 : x
  2. Step 2: Convert to fraction form
    739.55/1,109.37 = 277.45/x
  3. Step 3: Cross multiply
    739.55x = 1,109.37 × 277.45
  4. Step 4: Simplify right side
    739.55x = 307,793.32
  5. Step 5: Solve for x
    x = 307,793.32/739.55
  6. Step 6: Final answer
    x = 416.19

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1.5x scale

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.