Finding the Fourth Proportional to 709,165,772.81, 978,638,550.84 and 391,639,454.19
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Solution
The fourth proportional to 709,165,772.81, 978,638,550.84 and 391,639,454.19 is: 540,456,805.16
Step by Step Solution
- Step 1: Write the proportion equation
709,165,772.81 : 978,638,550.84 = 391,639,454.19 : x - Step 2: Convert to fraction form
709,165,772.81/978,638,550.84 = 391,639,454.19/x - Step 3: Cross multiply
709,165,772.81x = 978,638,550.84 × 391,639,454.19 - Step 4: Simplify right side
709,165,772.81x = 383,273,467,900,270,208 - Step 5: Solve for x
x = 383,273,467,900,270,208/709,165,772.81 - Step 6: Final answer
x = 540,456,805.16
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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.