Finding the Fourth Proportional to 478,334,685.79, 660,101,874.69 and 258,318,111.79
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Solution
The fourth proportional to 478,334,685.79, 660,101,874.69 and 258,318,111.79 is: 356,478,998.75
Step by Step Solution
- Step 1: Write the proportion equation
478,334,685.79 : 660,101,874.69 = 258,318,111.79 : x - Step 2: Convert to fraction form
478,334,685.79/660,101,874.69 = 258,318,111.79/x - Step 3: Cross multiply
478,334,685.79x = 660,101,874.69 × 258,318,111.79 - Step 4: Simplify right side
478,334,685.79x = 170,516,269,858,960,000 - Step 5: Solve for x
x = 170,516,269,858,960,000/478,334,685.79 - Step 6: Final answer
x = 356,478,998.75
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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.