Finding the Fourth Proportional to 515,929.60, 712,048.55 and 311,981.99
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Solution
The fourth proportional to 515,929.60, 712,048.55 and 311,981.99 is: 430,574.87
Step by Step Solution
- Step 1: Write the proportion equation
515,929.60 : 712,048.55 = 311,981.99 : x - Step 2: Convert to fraction form
515,929.60/712,048.55 = 311,981.99/x - Step 3: Cross multiply
515,929.60x = 712,048.55 × 311,981.99 - Step 4: Simplify right side
515,929.60x = 222,146,318,485.46 - Step 5: Solve for x
x = 222,146,318,485.46/515,929.60 - Step 6: Final answer
x = 430,574.87
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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.