Home / 681,392.58-1,020,778.80-380,961.96

Finding the Fourth Proportional to 681,392.58, 1,020,778.80 and 380,961.96

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Solution

The fourth proportional to 681,392.58, 1,020,778.80 and 380,961.96 is: 570,710.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,392.58 : 1,020,778.80 = 380,961.96 : x
  2. Step 2: Convert to fraction form
    681,392.58/1,020,778.80 = 380,961.96/x
  3. Step 3: Cross multiply
    681,392.58x = 1,020,778.80 × 380,961.96
  4. Step 4: Simplify right side
    681,392.58x = 388,877,892,374.45
  5. Step 5: Solve for x
    x = 388,877,892,374.45/681,392.58
  6. Step 6: Final answer
    x = 570,710.49

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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.