Finding the Fourth Proportional to 561,931,391.99, 775,448,486.12 and 311,046,067.50
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Solution
The fourth proportional to 561,931,391.99, 775,448,486.12 and 311,046,067.50 is: 429,234,254.56
Step by Step Solution
- Step 1: Write the proportion equation
561,931,391.99 : 775,448,486.12 = 311,046,067.50 : x - Step 2: Convert to fraction form
561,931,391.99/775,448,486.12 = 311,046,067.50/x - Step 3: Cross multiply
561,931,391.99x = 775,448,486.12 × 311,046,067.50 - Step 4: Simplify right side
561,931,391.99x = 241,200,202,154,899,104 - Step 5: Solve for x
x = 241,200,202,154,899,104/561,931,391.99 - Step 6: Final answer
x = 429,234,254.56
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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.