Finding the Fourth Proportional to 664,519.95, 917,029.35 and 378,039.42
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Solution
The fourth proportional to 664,519.95, 917,029.35 and 378,039.42 is: 521,689.75
Step by Step Solution
- Step 1: Write the proportion equation
664,519.95 : 917,029.35 = 378,039.42 : x - Step 2: Convert to fraction form
664,519.95/917,029.35 = 378,039.42/x - Step 3: Cross multiply
664,519.95x = 917,029.35 × 378,039.42 - Step 4: Simplify right side
664,519.95x = 346,673,243,596.98 - Step 5: Solve for x
x = 346,673,243,596.98/664,519.95 - Step 6: Final answer
x = 521,689.75
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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.