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Finding the Fourth Proportional to 839.94, 1,259.88 and 223.68

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Solution

The fourth proportional to 839.94, 1,259.88 and 223.68 is: 335.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.94 : 1,259.88 = 223.68 : x
  2. Step 2: Convert to fraction form
    839.94/1,259.88 = 223.68/x
  3. Step 3: Cross multiply
    839.94x = 1,259.88 × 223.68
  4. Step 4: Simplify right side
    839.94x = 281,809.96
  5. Step 5: Solve for x
    x = 281,809.96/839.94
  6. Step 6: Final answer
    x = 335.51

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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.