Finding the Fourth Proportional to 1,198,119,868.21, 1,653,569,667.44 and 689,472,128.08
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Solution
The fourth proportional to 1,198,119,868.21, 1,653,569,667.44 and 689,472,128.08 is: 951,566,055.94
Step by Step Solution
- Step 1: Write the proportion equation
1,198,119,868.21 : 1,653,569,667.44 = 689,472,128.08 : x - Step 2: Convert to fraction form
1,198,119,868.21/1,653,569,667.44 = 689,472,128.08/x - Step 3: Cross multiply
1,198,119,868.21x = 1,653,569,667.44 × 689,472,128.08 - Step 4: Simplify right side
1,198,119,868.21x = 1,140,090,197,538,394,752 - Step 5: Solve for x
x = 1,140,090,197,538,394,752/1,198,119,868.21 - Step 6: Final answer
x = 951,566,055.94
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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.