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Finding the Fourth Proportional to 705,364.80, 1,058,047.20 and 206,728.80

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Solution

The fourth proportional to 705,364.80, 1,058,047.20 and 206,728.80 is: 310,093.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,364.80 : 1,058,047.20 = 206,728.80 : x
  2. Step 2: Convert to fraction form
    705,364.80/1,058,047.20 = 206,728.80/x
  3. Step 3: Cross multiply
    705,364.80x = 1,058,047.20 × 206,728.80
  4. Step 4: Simplify right side
    705,364.80x = 218,728,827,999.36
  5. Step 5: Solve for x
    x = 218,728,827,999.36/705,364.80
  6. Step 6: Final answer
    x = 310,093.20

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Double scale
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Similar ratio
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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.