Finding the Fourth Proportional to 318,970.10, 439,984.09 and 189,821.99
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Solution
The fourth proportional to 318,970.10, 439,984.09 and 189,821.99 is: 261,838.51
Step by Step Solution
- Step 1: Write the proportion equation
318,970.10 : 439,984.09 = 189,821.99 : x - Step 2: Convert to fraction form
318,970.10/439,984.09 = 189,821.99/x - Step 3: Cross multiply
318,970.10x = 439,984.09 × 189,821.99 - Step 4: Simplify right side
318,970.10x = 83,518,655,532.14 - Step 5: Solve for x
x = 83,518,655,532.14/318,970.10 - Step 6: Final answer
x = 261,838.51
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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.