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Finding the Fourth Proportional to 685,879.32, 946,513.29 and 379,975.56

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Solution

The fourth proportional to 685,879.32, 946,513.29 and 379,975.56 is: 524,366.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,879.32 : 946,513.29 = 379,975.56 : x
  2. Step 2: Convert to fraction form
    685,879.32/946,513.29 = 379,975.56/x
  3. Step 3: Cross multiply
    685,879.32x = 946,513.29 × 379,975.56
  4. Step 4: Simplify right side
    685,879.32x = 359,651,917,415.19
  5. Step 5: Solve for x
    x = 359,651,917,415.19/685,879.32
  6. Step 6: Final answer
    x = 524,366.18

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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.