Finding the Fourth Proportional to 1,212,302,139.30, 1,818,453,208.95 and 921,736,772.55
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Solution
The fourth proportional to 1,212,302,139.30, 1,818,453,208.95 and 921,736,772.55 is: 1,382,605,158.83
Step by Step Solution
- Step 1: Write the proportion equation
1,212,302,139.30 : 1,818,453,208.95 = 921,736,772.55 : x - Step 2: Convert to fraction form
1,212,302,139.30/1,818,453,208.95 = 921,736,772.55/x - Step 3: Cross multiply
1,212,302,139.30x = 1,818,453,208.95 × 921,736,772.55 - Step 4: Simplify right side
1,212,302,139.30x = 1,676,135,191,850,763,776 - Step 5: Solve for x
x = 1,676,135,191,850,763,776/1,212,302,139.30 - Step 6: Final answer
x = 1,382,605,158.83
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1.5x scale
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.