Finding the Fourth Proportional to 1,277,457,781.80, 1,916,186,672.70 and 869,311,093.80
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Solution
The fourth proportional to 1,277,457,781.80, 1,916,186,672.70 and 869,311,093.80 is: 1,303,966,640.70
Step by Step Solution
- Step 1: Write the proportion equation
1,277,457,781.80 : 1,916,186,672.70 = 869,311,093.80 : x - Step 2: Convert to fraction form
1,277,457,781.80/1,916,186,672.70 = 869,311,093.80/x - Step 3: Cross multiply
1,277,457,781.80x = 1,916,186,672.70 × 869,311,093.80 - Step 4: Simplify right side
1,277,457,781.80x = 1,665,762,332,369,819,648 - Step 5: Solve for x
x = 1,665,762,332,369,819,648/1,277,457,781.80 - Step 6: Final answer
x = 1,303,966,640.70
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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.