Finding the Fourth Proportional to 520,619.36, 781,049.34 and 221,109.74
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Solution
The fourth proportional to 520,619.36, 781,049.34 and 221,109.74 is: 331,715.70
Step by Step Solution
- Step 1: Write the proportion equation
520,619.36 : 781,049.34 = 221,109.74 : x - Step 2: Convert to fraction form
520,619.36/781,049.34 = 221,109.74/x - Step 3: Cross multiply
520,619.36x = 781,049.34 × 221,109.74 - Step 4: Simplify right side
520,619.36x = 172,697,616,494.57 - Step 5: Solve for x
x = 172,697,616,494.57/520,619.36 - Step 6: Final answer
x = 331,715.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.