Finding the Fourth Proportional to 312,130,419.20, 430,739,828.68 and 186,682,612.96
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Solution
The fourth proportional to 312,130,419.20, 430,739,828.68 and 186,682,612.96 is: 257,621,916.28
Step by Step Solution
- Step 1: Write the proportion equation
312,130,419.20 : 430,739,828.68 = 186,682,612.96 : x - Step 2: Convert to fraction form
312,130,419.20/430,739,828.68 = 186,682,612.96/x - Step 3: Cross multiply
312,130,419.20x = 430,739,828.68 × 186,682,612.96 - Step 4: Simplify right side
312,130,419.20x = 80,411,636,723,925,152 - Step 5: Solve for x
x = 80,411,636,723,925,152/312,130,419.20 - Step 6: Final answer
x = 257,621,916.28
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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.