Finding the Fourth Proportional to 390,929.50, 539,479.06 and 221,163.63
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Solution
The fourth proportional to 390,929.50, 539,479.06 and 221,163.63 is: 305,203.74
Step by Step Solution
- Step 1: Write the proportion equation
390,929.50 : 539,479.06 = 221,163.63 : x - Step 2: Convert to fraction form
390,929.50/539,479.06 = 221,163.63/x - Step 3: Cross multiply
390,929.50x = 539,479.06 × 221,163.63 - Step 4: Simplify right side
390,929.50x = 119,313,147,218.59 - Step 5: Solve for x
x = 119,313,147,218.59/390,929.50 - Step 6: Final answer
x = 305,203.74
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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.