Finding the Fourth Proportional to 1,438,481,969.68, 1,985,105,120.68 and 778,432,247.44
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Solution
The fourth proportional to 1,438,481,969.68, 1,985,105,120.68 and 778,432,247.44 is: 1,074,236,502.83
Step by Step Solution
- Step 1: Write the proportion equation
1,438,481,969.68 : 1,985,105,120.68 = 778,432,247.44 : x - Step 2: Convert to fraction form
1,438,481,969.68/1,985,105,120.68 = 778,432,247.44/x - Step 3: Cross multiply
1,438,481,969.68x = 1,985,105,120.68 × 778,432,247.44 - Step 4: Simplify right side
1,438,481,969.68x = 1,545,269,840,495,585,024 - Step 5: Solve for x
x = 1,545,269,840,495,585,024/1,438,481,969.68 - Step 6: Final answer
x = 1,074,236,502.83
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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.