Home / 685,392.95-945,811.40-379,447.85

Finding the Fourth Proportional to 685,392.95, 945,811.40 and 379,447.85

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Solution

The fourth proportional to 685,392.95, 945,811.40 and 379,447.85 is: 523,620.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,392.95 : 945,811.40 = 379,447.85 : x
  2. Step 2: Convert to fraction form
    685,392.95/945,811.40 = 379,447.85/x
  3. Step 3: Cross multiply
    685,392.95x = 945,811.40 × 379,447.85
  4. Step 4: Simplify right side
    685,392.95x = 358,886,095,609.19
  5. Step 5: Solve for x
    x = 358,886,095,609.19/685,392.95
  6. Step 6: Final answer
    x = 523,620.94

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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.