Finding the Fourth Proportional to 256,243,513.80, 384,430,815.18 and 74,490,691.80
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Solution
The fourth proportional to 256,243,513.80, 384,430,815.18 and 74,490,691.80 is: 111,755,091.66
Step by Step Solution
- Step 1: Write the proportion equation
256,243,513.80 : 384,430,815.18 = 74,490,691.80 : x - Step 2: Convert to fraction form
256,243,513.80/384,430,815.18 = 74,490,691.80/x - Step 3: Cross multiply
256,243,513.80x = 384,430,815.18 × 74,490,691.80 - Step 4: Simplify right side
256,243,513.80x = 28,636,517,371,996,140 - Step 5: Solve for x
x = 28,636,517,371,996,140/256,243,513.80 - Step 6: Final answer
x = 111,755,091.66
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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.