Finding the Fourth Proportional to 313,403.80, 470,105.70 and 91,787.80
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Solution
The fourth proportional to 313,403.80, 470,105.70 and 91,787.80 is: 137,681.70
Step by Step Solution
- Step 1: Write the proportion equation
313,403.80 : 470,105.70 = 91,787.80 : x - Step 2: Convert to fraction form
313,403.80/470,105.70 = 91,787.80/x - Step 3: Cross multiply
313,403.80x = 470,105.70 × 91,787.80 - Step 4: Simplify right side
313,403.80x = 43,149,967,970.46 - Step 5: Solve for x
x = 43,149,967,970.46/313,403.80 - Step 6: Final answer
x = 137,681.70
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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.