Finding the Fourth Proportional to 387,903,617.96, 535,318,330.94 and 211,702,921.78
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Solution
The fourth proportional to 387,903,617.96, 535,318,330.94 and 211,702,921.78 is: 292,156,219.99
Step by Step Solution
- Step 1: Write the proportion equation
387,903,617.96 : 535,318,330.94 = 211,702,921.78 : x - Step 2: Convert to fraction form
387,903,617.96/535,318,330.94 = 211,702,921.78/x - Step 3: Cross multiply
387,903,617.96x = 535,318,330.94 × 211,702,921.78 - Step 4: Simplify right side
387,903,617.96x = 113,328,454,742,390,976 - Step 5: Solve for x
x = 113,328,454,742,390,976/387,903,617.96 - Step 6: Final answer
x = 292,156,219.99
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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.