Finding the Fourth Proportional to 644,178.30, 888,988.41 and 357,703.17
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Solution
The fourth proportional to 644,178.30, 888,988.41 and 357,703.17 is: 493,642.79
Step by Step Solution
- Step 1: Write the proportion equation
644,178.30 : 888,988.41 = 357,703.17 : x - Step 2: Convert to fraction form
644,178.30/888,988.41 = 357,703.17/x - Step 3: Cross multiply
644,178.30x = 888,988.41 × 357,703.17 - Step 4: Simplify right side
644,178.30x = 317,993,972,350.26 - Step 5: Solve for x
x = 317,993,972,350.26/644,178.30 - Step 6: Final answer
x = 493,642.79
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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.