Finding the Fourth Proportional to 664,206.99, 916,579.20 and 392,362.20
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Solution
The fourth proportional to 664,206.99, 916,579.20 and 392,362.20 is: 541,444.21
Step by Step Solution
- Step 1: Write the proportion equation
664,206.99 : 916,579.20 = 392,362.20 : x - Step 2: Convert to fraction form
664,206.99/916,579.20 = 392,362.20/x - Step 3: Cross multiply
664,206.99x = 916,579.20 × 392,362.20 - Step 4: Simplify right side
664,206.99x = 359,631,031,386.24 - Step 5: Solve for x
x = 359,631,031,386.24/664,206.99 - Step 6: Final answer
x = 541,444.21
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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.