Finding the Fourth Proportional to 621,432,643.20, 932,148,964.80 and 258,635,587.20
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Solution
The fourth proportional to 621,432,643.20, 932,148,964.80 and 258,635,587.20 is: 387,953,380.80
Step by Step Solution
- Step 1: Write the proportion equation
621,432,643.20 : 932,148,964.80 = 258,635,587.20 : x - Step 2: Convert to fraction form
621,432,643.20/932,148,964.80 = 258,635,587.20/x - Step 3: Cross multiply
621,432,643.20x = 932,148,964.80 × 258,635,587.20 - Step 4: Simplify right side
621,432,643.20x = 241,086,894,868,920,096 - Step 5: Solve for x
x = 241,086,894,868,920,096/621,432,643.20 - Step 6: Final answer
x = 387,953,380.80
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Similar ratio
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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.