Finding the Fourth Proportional to 909,660,658.75, 1,255,331,711.04 and 491,972,943.98
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Solution
The fourth proportional to 909,660,658.75, 1,255,331,711.04 and 491,972,943.98 is: 678,922,663.76
Step by Step Solution
- Step 1: Write the proportion equation
909,660,658.75 : 1,255,331,711.04 = 491,972,943.98 : x - Step 2: Convert to fraction form
909,660,658.75/1,255,331,711.04 = 491,972,943.98/x - Step 3: Cross multiply
909,660,658.75x = 1,255,331,711.04 × 491,972,943.98 - Step 4: Simplify right side
909,660,658.75x = 617,589,237,551,799,424 - Step 5: Solve for x
x = 617,589,237,551,799,424/909,660,658.75 - Step 6: Final answer
x = 678,922,663.76
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Double scale
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Similar ratio
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1.5x scale
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.