Finding the Fourth Proportional to 457,685.40, 687,305.70 and 339,490.20
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Solution
The fourth proportional to 457,685.40, 687,305.70 and 339,490.20 is: 509,812.09
Step by Step Solution
- Step 1: Write the proportion equation
457,685.40 : 687,305.70 = 339,490.20 : x - Step 2: Convert to fraction form
457,685.40/687,305.70 = 339,490.20/x - Step 3: Cross multiply
457,685.40x = 687,305.70 × 339,490.20 - Step 4: Simplify right side
457,685.40x = 233,333,549,554.14 - Step 5: Solve for x
x = 233,333,549,554.14/457,685.40 - Step 6: Final answer
x = 509,812.09
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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.