Finding the Fourth Proportional to 712,181,638.80, 1,068,272,458.20 and 220,893,958.80
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Solution
The fourth proportional to 712,181,638.80, 1,068,272,458.20 and 220,893,958.80 is: 331,340,938.20
Step by Step Solution
- Step 1: Write the proportion equation
712,181,638.80 : 1,068,272,458.20 = 220,893,958.80 : x - Step 2: Convert to fraction form
712,181,638.80/1,068,272,458.20 = 220,893,958.80/x - Step 3: Cross multiply
712,181,638.80x = 1,068,272,458.20 × 220,893,958.80 - Step 4: Simplify right side
712,181,638.80x = 235,974,932,368,805,536 - Step 5: Solve for x
x = 235,974,932,368,805,536/712,181,638.80 - Step 6: Final answer
x = 331,340,938.20
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Double scale
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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.