Finding the Fourth Proportional to 278,931,243.09, 384,913,556.60 and 151,772,446.43
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Solution
The fourth proportional to 278,931,243.09, 384,913,556.60 and 151,772,446.43 is: 209,439,686.65
Step by Step Solution
- Step 1: Write the proportion equation
278,931,243.09 : 384,913,556.60 = 151,772,446.43 : x - Step 2: Convert to fraction form
278,931,243.09/384,913,556.60 = 151,772,446.43/x - Step 3: Cross multiply
278,931,243.09x = 384,913,556.60 × 151,772,446.43 - Step 4: Simplify right side
278,931,243.09x = 58,419,272,148,495,416 - Step 5: Solve for x
x = 58,419,272,148,495,416/278,931,243.09 - Step 6: Final answer
x = 209,439,686.65
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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.