Finding the Fourth Proportional to 1,438,481,863.68, 1,985,104,974.24 and 778,432,141.44
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Solution
The fourth proportional to 1,438,481,863.68, 1,985,104,974.24 and 778,432,141.44 is: 1,074,236,356.47
Step by Step Solution
- Step 1: Write the proportion equation
1,438,481,863.68 : 1,985,104,974.24 = 778,432,141.44 : x - Step 2: Convert to fraction form
1,438,481,863.68/1,985,104,974.24 = 778,432,141.44/x - Step 3: Cross multiply
1,438,481,863.68x = 1,985,104,974.24 × 778,432,141.44 - Step 4: Simplify right side
1,438,481,863.68x = 1,545,269,516,080,839,424 - Step 5: Solve for x
x = 1,545,269,516,080,839,424/1,438,481,863.68 - Step 6: Final answer
x = 1,074,236,356.47
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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.