Finding the Fourth Proportional to 685,106,876.21, 945,285,441.26 and 387,749,112.11
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Solution
The fourth proportional to 685,106,876.21, 945,285,441.26 and 387,749,112.11 is: 535,002,060.65
Step by Step Solution
- Step 1: Write the proportion equation
685,106,876.21 : 945,285,441.26 = 387,749,112.11 : x - Step 2: Convert to fraction form
685,106,876.21/945,285,441.26 = 387,749,112.11/x - Step 3: Cross multiply
685,106,876.21x = 945,285,441.26 × 387,749,112.11 - Step 4: Simplify right side
685,106,876.21x = 366,533,590,532,409,408 - Step 5: Solve for x
x = 366,533,590,532,409,408/685,106,876.21 - Step 6: Final answer
x = 535,002,060.65
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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.