Finding the Fourth Proportional to 1,438,239,041.28, 2,157,421,350.69 and 455,737,985.82
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Solution
The fourth proportional to 1,438,239,041.28, 2,157,421,350.69 and 455,737,985.82 is: 683,626,874.75
Step by Step Solution
- Step 1: Write the proportion equation
1,438,239,041.28 : 2,157,421,350.69 = 455,737,985.82 : x - Step 2: Convert to fraction form
1,438,239,041.28/2,157,421,350.69 = 455,737,985.82/x - Step 3: Cross multiply
1,438,239,041.28x = 2,157,421,350.69 × 455,737,985.82 - Step 4: Simplify right side
1,438,239,041.28x = 983,218,860,928,524,416 - Step 5: Solve for x
x = 983,218,860,928,524,416/1,438,239,041.28 - Step 6: Final answer
x = 683,626,874.75
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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.