Finding the Fourth Proportional to 1,225,168,421.14, 1,690,875,359.78 and 696,611,603.94
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Solution
The fourth proportional to 1,225,168,421.14, 1,690,875,359.78 and 696,611,603.94 is: 961,405,286.09
Step by Step Solution
- Step 1: Write the proportion equation
1,225,168,421.14 : 1,690,875,359.78 = 696,611,603.94 : x - Step 2: Convert to fraction form
1,225,168,421.14/1,690,875,359.78 = 696,611,603.94/x - Step 3: Cross multiply
1,225,168,421.14x = 1,690,875,359.78 × 696,611,603.94 - Step 4: Simplify right side
1,225,168,421.14x = 1,177,883,396,438,970,368 - Step 5: Solve for x
x = 1,177,883,396,438,970,368/1,225,168,421.14 - Step 6: Final answer
x = 961,405,286.09
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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.