Finding the Fourth Proportional to 638,618,340.80, 956,135,920.80 and 620,702,436.80
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Solution
The fourth proportional to 638,618,340.80, 956,135,920.80 and 620,702,436.80 is: 929,312,326.37
Step by Step Solution
- Step 1: Write the proportion equation
638,618,340.80 : 956,135,920.80 = 620,702,436.80 : x - Step 2: Convert to fraction form
638,618,340.80/956,135,920.80 = 620,702,436.80/x - Step 3: Cross multiply
638,618,340.80x = 956,135,920.80 × 620,702,436.80 - Step 4: Simplify right side
638,618,340.80x = 593,475,895,952,571,776 - Step 5: Solve for x
x = 593,475,895,952,571,776/638,618,340.80 - Step 6: Final answer
x = 929,312,326.37
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1.5x scale
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.