Finding the Fourth Proportional to 391,276.98, 539,959.41 and 221,509.62
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Solution
The fourth proportional to 391,276.98, 539,959.41 and 221,509.62 is: 305,681.68
Step by Step Solution
- Step 1: Write the proportion equation
391,276.98 : 539,959.41 = 221,509.62 : x - Step 2: Convert to fraction form
391,276.98/539,959.41 = 221,509.62/x - Step 3: Cross multiply
391,276.98x = 539,959.41 × 221,509.62 - Step 4: Simplify right side
391,276.98x = 119,606,203,724.52 - Step 5: Solve for x
x = 119,606,203,724.52/391,276.98 - Step 6: Final answer
x = 305,681.68
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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.