Finding the Fourth Proportional to 717,932,557.71, 990,823,098.94 and 420,824,425.68
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Solution
The fourth proportional to 717,932,557.71, 990,823,098.94 and 420,824,425.68 is: 580,782,354.95
Step by Step Solution
- Step 1: Write the proportion equation
717,932,557.71 : 990,823,098.94 = 420,824,425.68 : x - Step 2: Convert to fraction form
717,932,557.71/990,823,098.94 = 420,824,425.68/x - Step 3: Cross multiply
717,932,557.71x = 990,823,098.94 × 420,824,425.68 - Step 4: Simplify right side
717,932,557.71x = 416,962,561,560,851,264 - Step 5: Solve for x
x = 416,962,561,560,851,264/717,932,557.71 - Step 6: Final answer
x = 580,782,354.95
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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.