Finding the Fourth Proportional to 713,721.72, 984,948.57 and 391,428.99
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Solution
The fourth proportional to 713,721.72, 984,948.57 and 391,428.99 is: 540,178.91
Step by Step Solution
- Step 1: Write the proportion equation
713,721.72 : 984,948.57 = 391,428.99 : x - Step 2: Convert to fraction form
713,721.72/984,948.57 = 391,428.99/x - Step 3: Cross multiply
713,721.72x = 984,948.57 × 391,428.99 - Step 4: Simplify right side
713,721.72x = 385,537,423,957.04 - Step 5: Solve for x
x = 385,537,423,957.04/713,721.72 - Step 6: Final answer
x = 540,178.91
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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.