Finding the Fourth Proportional to 1,139,652,843.12, 1,571,472,028.98 and 742,439,225.70
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Solution
The fourth proportional to 1,139,652,843.12, 1,571,472,028.98 and 742,439,225.70 is: 1,023,752,525.56
Step by Step Solution
- Step 1: Write the proportion equation
1,139,652,843.12 : 1,571,472,028.98 = 742,439,225.70 : x - Step 2: Convert to fraction form
1,139,652,843.12/1,571,472,028.98 = 742,439,225.70/x - Step 3: Cross multiply
1,139,652,843.12x = 1,571,472,028.98 × 742,439,225.70 - Step 4: Simplify right side
1,139,652,843.12x = 1,166,722,476,405,119,232 - Step 5: Solve for x
x = 1,166,722,476,405,119,232/1,139,652,843.12 - Step 6: Final answer
x = 1,023,752,525.56
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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.