Finding the Fourth Proportional to 1,242,757,847.12, 1,864,440,276.76 and 413,709,887.12
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Solution
The fourth proportional to 1,242,757,847.12, 1,864,440,276.76 and 413,709,887.12 is: 620,665,866.83
Step by Step Solution
- Step 1: Write the proportion equation
1,242,757,847.12 : 1,864,440,276.76 = 413,709,887.12 : x - Step 2: Convert to fraction form
1,242,757,847.12/1,864,440,276.76 = 413,709,887.12/x - Step 3: Cross multiply
1,242,757,847.12x = 1,864,440,276.76 × 413,709,887.12 - Step 4: Simplify right side
1,242,757,847.12x = 771,337,376,440,361,216 - Step 5: Solve for x
x = 771,337,376,440,361,216/1,242,757,847.12 - Step 6: Final answer
x = 620,665,866.83
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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.