Finding the Fourth Proportional to 689,641.13, 951,689.84 and 399,264.94
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Solution
The fourth proportional to 689,641.13, 951,689.84 and 399,264.94 is: 550,976.98
Step by Step Solution
- Step 1: Write the proportion equation
689,641.13 : 951,689.84 = 399,264.94 : x - Step 2: Convert to fraction form
689,641.13/951,689.84 = 399,264.94/x - Step 3: Cross multiply
689,641.13x = 951,689.84 × 399,264.94 - Step 4: Simplify right side
689,641.13x = 379,976,387,556.74 - Step 5: Solve for x
x = 379,976,387,556.74/689,641.13 - Step 6: Final answer
x = 550,976.98
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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.