Finding the Fourth Proportional to 1,273,128,974.70, 1,909,693,462.05 and 1,212,863,565.30
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Solution
The fourth proportional to 1,273,128,974.70, 1,909,693,462.05 and 1,212,863,565.30 is: 1,819,295,347.95
Step by Step Solution
- Step 1: Write the proportion equation
1,273,128,974.70 : 1,909,693,462.05 = 1,212,863,565.30 : x - Step 2: Convert to fraction form
1,273,128,974.70/1,909,693,462.05 = 1,212,863,565.30/x - Step 3: Cross multiply
1,273,128,974.70x = 1,909,693,462.05 × 1,212,863,565.30 - Step 4: Simplify right side
1,273,128,974.70x = 2,316,197,621,012,063,232 - Step 5: Solve for x
x = 2,316,197,621,012,063,232/1,273,128,974.70 - Step 6: Final answer
x = 1,819,295,347.95
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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.