Finding the Fourth Proportional to 1,261,126,306.08, 1,740,319,395.12 and 696,601,069.92
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Solution
The fourth proportional to 1,261,126,306.08, 1,740,319,395.12 and 696,601,069.92 is: 961,290,194.96
Step by Step Solution
- Step 1: Write the proportion equation
1,261,126,306.08 : 1,740,319,395.12 = 696,601,069.92 : x - Step 2: Convert to fraction form
1,261,126,306.08/1,740,319,395.12 = 696,601,069.92/x - Step 3: Cross multiply
1,261,126,306.08x = 1,740,319,395.12 × 696,601,069.92 - Step 4: Simplify right side
1,261,126,306.08x = 1,212,308,352,643,119,104 - Step 5: Solve for x
x = 1,212,308,352,643,119,104/1,261,126,306.08 - Step 6: Final answer
x = 961,290,194.96
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Double scale
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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.