Finding the Fourth Proportional to 687,826,104.24, 949,175,088.68 and 420,349,425.47
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Solution
The fourth proportional to 687,826,104.24, 949,175,088.68 and 420,349,425.47 is: 580,066,968.58
Step by Step Solution
- Step 1: Write the proportion equation
687,826,104.24 : 949,175,088.68 = 420,349,425.47 : x - Step 2: Convert to fraction form
687,826,104.24/949,175,088.68 = 420,349,425.47/x - Step 3: Cross multiply
687,826,104.24x = 949,175,088.68 × 420,349,425.47 - Step 4: Simplify right side
687,826,104.24x = 398,985,203,197,074,304 - Step 5: Solve for x
x = 398,985,203,197,074,304/687,826,104.24 - Step 6: Final answer
x = 580,066,968.58
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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.