Finding the Fourth Proportional to 1,317,370,772.42, 1,817,974,425.35 and 722,660,059.25
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Solution
The fourth proportional to 1,317,370,772.42, 1,817,974,425.35 and 722,660,059.25 is: 997,272,395.47
Step by Step Solution
- Step 1: Write the proportion equation
1,317,370,772.42 : 1,817,974,425.35 = 722,660,059.25 : x - Step 2: Convert to fraction form
1,317,370,772.42/1,817,974,425.35 = 722,660,059.25/x - Step 3: Cross multiply
1,317,370,772.42x = 1,817,974,425.35 × 722,660,059.25 - Step 4: Simplify right side
1,317,370,772.42x = 1,313,777,505,938,415,616 - Step 5: Solve for x
x = 1,313,777,505,938,415,616/1,317,370,772.42 - Step 6: Final answer
x = 997,272,395.47
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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.