Finding the Fourth Proportional to 399,383,675.49, 551,138,895.90 and 223,173,118.80
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Solution
The fourth proportional to 399,383,675.49, 551,138,895.90 and 223,173,118.80 is: 307,972,993.99
Step by Step Solution
- Step 1: Write the proportion equation
399,383,675.49 : 551,138,895.90 = 223,173,118.80 : x - Step 2: Convert to fraction form
399,383,675.49/551,138,895.90 = 223,173,118.80/x - Step 3: Cross multiply
399,383,675.49x = 551,138,895.90 × 223,173,118.80 - Step 4: Simplify right side
399,383,675.49x = 122,999,386,289,991,536 - Step 5: Solve for x
x = 122,999,386,289,991,536/399,383,675.49 - Step 6: Final answer
x = 307,972,993.99
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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.