Finding the Fourth Proportional to 690,222,386.41, 952,530,395.90 and 408,206,576.74
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Solution
The fourth proportional to 690,222,386.41, 952,530,395.90 and 408,206,576.74 is: 563,338,975.68
Step by Step Solution
- Step 1: Write the proportion equation
690,222,386.41 : 952,530,395.90 = 408,206,576.74 : x - Step 2: Convert to fraction form
690,222,386.41/952,530,395.90 = 408,206,576.74/x - Step 3: Cross multiply
690,222,386.41x = 952,530,395.90 × 408,206,576.74 - Step 4: Simplify right side
690,222,386.41x = 388,829,172,151,135,936 - Step 5: Solve for x
x = 388,829,172,151,135,936/690,222,386.41 - Step 6: Final answer
x = 563,338,975.68
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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.