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Finding the Fourth Proportional to 739.75, 1,109.63 and 277.64

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Solution

The fourth proportional to 739.75, 1,109.63 and 277.64 is: 416.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.75 : 1,109.63 = 277.64 : x
  2. Step 2: Convert to fraction form
    739.75/1,109.63 = 277.64/x
  3. Step 3: Cross multiply
    739.75x = 1,109.63 × 277.64
  4. Step 4: Simplify right side
    739.75x = 308,070.74
  5. Step 5: Solve for x
    x = 308,070.74/739.75
  6. Step 6: Final answer
    x = 416.45

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Double scale
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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.