Finding the Fourth Proportional to 2,178,807.18, 3,006,709.62 and 1,211,916.66
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Solution
The fourth proportional to 2,178,807.18, 3,006,709.62 and 1,211,916.66 is: 1,672,420.36
Step by Step Solution
- Step 1: Write the proportion equation
2,178,807.18 : 3,006,709.62 = 1,211,916.66 : x - Step 2: Convert to fraction form
2,178,807.18/3,006,709.62 = 1,211,916.66/x - Step 3: Cross multiply
2,178,807.18x = 3,006,709.62 × 1,211,916.66 - Step 4: Simplify right side
2,178,807.18x = 3,643,881,480,260.27 - Step 5: Solve for x
x = 3,643,881,480,260.27/2,178,807.18 - Step 6: Final answer
x = 1,672,420.36
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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.