Finding the Fourth Proportional to 1,315,128,474.02, 1,972,676,250.61 and 319,157,752.99
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Solution
The fourth proportional to 1,315,128,474.02, 1,972,676,250.61 and 319,157,752.99 is: 478,732,634.84
Step by Step Solution
- Step 1: Write the proportion equation
1,315,128,474.02 : 1,972,676,250.61 = 319,157,752.99 : x - Step 2: Convert to fraction form
1,315,128,474.02/1,972,676,250.61 = 319,157,752.99/x - Step 3: Cross multiply
1,315,128,474.02x = 1,972,676,250.61 × 319,157,752.99 - Step 4: Simplify right side
1,315,128,474.02x = 629,594,919,521,425,664 - Step 5: Solve for x
x = 629,594,919,521,425,664/1,315,128,474.02 - Step 6: Final answer
x = 478,732,634.84
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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.