Finding the Fourth Proportional to 1,125,215,981.12, 1,552,798,053.96 and 630,178,689.62
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Solution
The fourth proportional to 1,125,215,981.12, 1,552,798,053.96 and 630,178,689.62 is: 869,646,591.68
Step by Step Solution
- Step 1: Write the proportion equation
1,125,215,981.12 : 1,552,798,053.96 = 630,178,689.62 : x - Step 2: Convert to fraction form
1,125,215,981.12/1,552,798,053.96 = 630,178,689.62/x - Step 3: Cross multiply
1,125,215,981.12x = 1,552,798,053.96 × 630,178,689.62 - Step 4: Simplify right side
1,125,215,981.12x = 978,540,242,888,998,912 - Step 5: Solve for x
x = 978,540,242,888,998,912/1,125,215,981.12 - Step 6: Final answer
x = 869,646,591.68
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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.