Finding the Fourth Proportional to 385,365,248.42, 531,804,569.45 and 209,153,246.49
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Solution
The fourth proportional to 385,365,248.42, 531,804,569.45 and 209,153,246.49 is: 288,631,765.98
Step by Step Solution
- Step 1: Write the proportion equation
385,365,248.42 : 531,804,569.45 = 209,153,246.49 : x - Step 2: Convert to fraction form
385,365,248.42/531,804,569.45 = 209,153,246.49/x - Step 3: Cross multiply
385,365,248.42x = 531,804,569.45 × 209,153,246.49 - Step 4: Simplify right side
385,365,248.42x = 111,228,652,197,638,416 - Step 5: Solve for x
x = 111,228,652,197,638,416/385,365,248.42 - Step 6: Final answer
x = 288,631,765.98
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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.