Finding the Fourth Proportional to 1,040,043,131.70, 1,560,064,697.55 and 349,720,955.70
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Solution
The fourth proportional to 1,040,043,131.70, 1,560,064,697.55 and 349,720,955.70 is: 524,581,433.55
Step by Step Solution
- Step 1: Write the proportion equation
1,040,043,131.70 : 1,560,064,697.55 = 349,720,955.70 : x - Step 2: Convert to fraction form
1,040,043,131.70/1,560,064,697.55 = 349,720,955.70/x - Step 3: Cross multiply
1,040,043,131.70x = 1,560,064,697.55 × 349,720,955.70 - Step 4: Simplify right side
1,040,043,131.70x = 545,587,316,981,017,408 - Step 5: Solve for x
x = 545,587,316,981,017,408/1,040,043,131.70 - Step 6: Final answer
x = 524,581,433.55
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Double scale
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Similar ratio
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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.