Finding the Fourth Proportional to 1,115,277,130.40, 1,672,915,695.60 and 388,024,138.40
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Solution
The fourth proportional to 1,115,277,130.40, 1,672,915,695.60 and 388,024,138.40 is: 582,036,207.60
Step by Step Solution
- Step 1: Write the proportion equation
1,115,277,130.40 : 1,672,915,695.60 = 388,024,138.40 : x - Step 2: Convert to fraction form
1,115,277,130.40/1,672,915,695.60 = 388,024,138.40/x - Step 3: Cross multiply
1,115,277,130.40x = 1,672,915,695.60 × 388,024,138.40 - Step 4: Simplify right side
1,115,277,130.40x = 649,131,671,401,026,560 - Step 5: Solve for x
x = 649,131,671,401,026,560/1,115,277,130.40 - Step 6: Final answer
x = 582,036,207.60
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.