Finding the Fourth Proportional to 1,315,128,472.52, 1,972,676,248.36 and 319,157,751.49
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Solution
The fourth proportional to 1,315,128,472.52, 1,972,676,248.36 and 319,157,751.49 is: 478,732,632.59
Step by Step Solution
- Step 1: Write the proportion equation
1,315,128,472.52 : 1,972,676,248.36 = 319,157,751.49 : x - Step 2: Convert to fraction form
1,315,128,472.52/1,972,676,248.36 = 319,157,751.49/x - Step 3: Cross multiply
1,315,128,472.52x = 1,972,676,248.36 × 319,157,751.49 - Step 4: Simplify right side
1,315,128,472.52x = 629,594,915,838,576,896 - Step 5: Solve for x
x = 629,594,915,838,576,896/1,315,128,472.52 - Step 6: Final answer
x = 478,732,632.59
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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.