Finding the Fourth Proportional to 1,315,128,475.02, 1,972,676,252.11 and 319,157,753.99
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Solution
The fourth proportional to 1,315,128,475.02, 1,972,676,252.11 and 319,157,753.99 is: 478,732,636.34
Step by Step Solution
- Step 1: Write the proportion equation
1,315,128,475.02 : 1,972,676,252.11 = 319,157,753.99 : x - Step 2: Convert to fraction form
1,315,128,475.02/1,972,676,252.11 = 319,157,753.99/x - Step 3: Cross multiply
1,315,128,475.02x = 1,972,676,252.11 × 319,157,753.99 - Step 4: Simplify right side
1,315,128,475.02x = 629,594,921,972,838,528 - Step 5: Solve for x
x = 629,594,921,972,838,528/1,315,128,475.02 - Step 6: Final answer
x = 478,732,636.34
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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.