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Finding the Fourth Proportional to 685,878.82, 946,512.60 and 379,975.07

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Solution

The fourth proportional to 685,878.82, 946,512.60 and 379,975.07 is: 524,365.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,878.82 : 946,512.60 = 379,975.07 : x
  2. Step 2: Convert to fraction form
    685,878.82/946,512.60 = 379,975.07/x
  3. Step 3: Cross multiply
    685,878.82x = 946,512.60 × 379,975.07
  4. Step 4: Simplify right side
    685,878.82x = 359,651,186,708.32
  5. Step 5: Solve for x
    x = 359,651,186,708.32/685,878.82
  6. Step 6: Final answer
    x = 524,365.50

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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.