Finding the Fourth Proportional to 386,587,828.28, 533,491,289.88 and 212,747,572.28
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Solution
The fourth proportional to 386,587,828.28, 533,491,289.88 and 212,747,572.28 is: 293,591,697.54
Step by Step Solution
- Step 1: Write the proportion equation
386,587,828.28 : 533,491,289.88 = 212,747,572.28 : x - Step 2: Convert to fraction form
386,587,828.28/533,491,289.88 = 212,747,572.28/x - Step 3: Cross multiply
386,587,828.28x = 533,491,289.88 × 212,747,572.28 - Step 4: Simplify right side
386,587,828.28x = 113,498,976,754,495,728 - Step 5: Solve for x
x = 113,498,976,754,495,728/386,587,828.28 - Step 6: Final answer
x = 293,591,697.54
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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.