Home / 780,434.75-1,076,999.96-422,738.75

Finding the Fourth Proportional to 780,434.75, 1,076,999.96 and 422,738.75

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Solution

The fourth proportional to 780,434.75, 1,076,999.96 and 422,738.75 is: 583,379.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,434.75 : 1,076,999.96 = 422,738.75 : x
  2. Step 2: Convert to fraction form
    780,434.75/1,076,999.96 = 422,738.75/x
  3. Step 3: Cross multiply
    780,434.75x = 1,076,999.96 × 422,738.75
  4. Step 4: Simplify right side
    780,434.75x = 455,289,616,840.45
  5. Step 5: Solve for x
    x = 455,289,616,840.45/780,434.75
  6. Step 6: Final answer
    x = 583,379.48

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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.