Finding the Fourth Proportional to 387,908,295.11, 535,305,977.34 and 211,697,551.53
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Solution
The fourth proportional to 387,908,295.11, 535,305,977.34 and 211,697,551.53 is: 292,138,544.47
Step by Step Solution
- Step 1: Write the proportion equation
387,908,295.11 : 535,305,977.34 = 211,697,551.53 : x - Step 2: Convert to fraction form
387,908,295.11/535,305,977.34 = 211,697,551.53/x - Step 3: Cross multiply
387,908,295.11x = 535,305,977.34 × 211,697,551.53 - Step 4: Simplify right side
387,908,295.11x = 113,322,964,721,457,792 - Step 5: Solve for x
x = 113,322,964,721,457,792/387,908,295.11 - Step 6: Final answer
x = 292,138,544.47
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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.