Finding the Fourth Proportional to 1,421,197.84, 1,961,278.68 and 776,645.20
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Solution
The fourth proportional to 1,421,197.84, 1,961,278.68 and 776,645.20 is: 1,071,784.40
Step by Step Solution
- Step 1: Write the proportion equation
1,421,197.84 : 1,961,278.68 = 776,645.20 : x - Step 2: Convert to fraction form
1,421,197.84/1,961,278.68 = 776,645.20/x - Step 3: Cross multiply
1,421,197.84x = 1,961,278.68 × 776,645.20 - Step 4: Simplify right side
1,421,197.84x = 1,523,217,672,684.34 - Step 5: Solve for x
x = 1,523,217,672,684.34/1,421,197.84 - Step 6: Final answer
x = 1,071,784.40
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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.