Finding the Fourth Proportional to 1,207,360,372.34, 1,811,423,369.07 and 430,989,368.18
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Solution
The fourth proportional to 1,207,360,372.34, 1,811,423,369.07 and 430,989,368.18 is: 646,620,703.50
Step by Step Solution
- Step 1: Write the proportion equation
1,207,360,372.34 : 1,811,423,369.07 = 430,989,368.18 : x - Step 2: Convert to fraction form
1,207,360,372.34/1,811,423,369.07 = 430,989,368.18/x - Step 3: Cross multiply
1,207,360,372.34x = 1,811,423,369.07 × 430,989,368.18 - Step 4: Simplify right side
1,207,360,372.34x = 780,704,213,341,966,208 - Step 5: Solve for x
x = 780,704,213,341,966,208/1,207,360,372.34 - Step 6: Final answer
x = 646,620,703.50
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Double scale
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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.