Finding the Fourth Proportional to 1,277,339,900.72, 1,762,395,954.84 and 748,419,702.80
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Solution
The fourth proportional to 1,277,339,900.72, 1,762,395,954.84 and 748,419,702.80 is: 1,032,624,014.95
Step by Step Solution
- Step 1: Write the proportion equation
1,277,339,900.72 : 1,762,395,954.84 = 748,419,702.80 : x - Step 2: Convert to fraction form
1,277,339,900.72/1,762,395,954.84 = 748,419,702.80/x - Step 3: Cross multiply
1,277,339,900.72x = 1,762,395,954.84 × 748,419,702.80 - Step 4: Simplify right side
1,277,339,900.72x = 1,319,011,856,737,274,880 - Step 5: Solve for x
x = 1,319,011,856,737,274,880/1,277,339,900.72 - Step 6: Final answer
x = 1,032,624,014.95
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1.5x scale
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.