Finding the Fourth Proportional to 1,259,716,517.80, 1,889,574,776.70 and 647,496,485.80
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Solution
The fourth proportional to 1,259,716,517.80, 1,889,574,776.70 and 647,496,485.80 is: 971,244,728.70
Step by Step Solution
- Step 1: Write the proportion equation
1,259,716,517.80 : 1,889,574,776.70 = 647,496,485.80 : x - Step 2: Convert to fraction form
1,259,716,517.80/1,889,574,776.70 = 647,496,485.80/x - Step 3: Cross multiply
1,259,716,517.80x = 1,889,574,776.70 × 647,496,485.80 - Step 4: Simplify right side
1,259,716,517.80x = 1,223,493,027,569,569,536 - Step 5: Solve for x
x = 1,223,493,027,569,569,536/1,259,716,517.80 - Step 6: Final answer
x = 971,244,728.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.