Finding the Fourth Proportional to 718,596,763.76, 991,475,053.08 and 421,079,266.64
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Solution
The fourth proportional to 718,596,763.76, 991,475,053.08 and 421,079,266.64 is: 580,978,942.99
Step by Step Solution
- Step 1: Write the proportion equation
718,596,763.76 : 991,475,053.08 = 421,079,266.64 : x - Step 2: Convert to fraction form
718,596,763.76/991,475,053.08 = 421,079,266.64/x - Step 3: Cross multiply
718,596,763.76x = 991,475,053.08 × 421,079,266.64 - Step 4: Simplify right side
718,596,763.76x = 417,489,588,242,781,504 - Step 5: Solve for x
x = 417,489,588,242,781,504/718,596,763.76 - Step 6: Final answer
x = 580,978,942.99
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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.