Finding the Fourth Proportional to 518,400.06, 715,425.03 and 390,850.62
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Solution
The fourth proportional to 518,400.06, 715,425.03 and 390,850.62 is: 539,398.70
Step by Step Solution
- Step 1: Write the proportion equation
518,400.06 : 715,425.03 = 390,850.62 : x - Step 2: Convert to fraction form
518,400.06/715,425.03 = 390,850.62/x - Step 3: Cross multiply
518,400.06x = 715,425.03 × 390,850.62 - Step 4: Simplify right side
518,400.06x = 279,624,316,539.02 - Step 5: Solve for x
x = 279,624,316,539.02/518,400.06 - Step 6: Final answer
x = 539,398.70
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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.