Finding the Fourth Proportional to 289,656,905.60, 434,485,358.40 and 257,912,163.20
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Solution
The fourth proportional to 289,656,905.60, 434,485,358.40 and 257,912,163.20 is: 386,868,244.80
Step by Step Solution
- Step 1: Write the proportion equation
289,656,905.60 : 434,485,358.40 = 257,912,163.20 : x - Step 2: Convert to fraction form
289,656,905.60/434,485,358.40 = 257,912,163.20/x - Step 3: Cross multiply
289,656,905.60x = 434,485,358.40 × 257,912,163.20 - Step 4: Simplify right side
289,656,905.60x = 112,059,058,663,671,280 - Step 5: Solve for x
x = 112,059,058,663,671,280/289,656,905.60 - Step 6: Final answer
x = 386,868,244.80
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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.