Finding the Fourth Proportional to 987.68, 1,362.99 and 545.58
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Solution
The fourth proportional to 987.68, 1,362.99 and 545.58 is: 752.90
Step by Step Solution
- Step 1: Write the proportion equation
987.68 : 1,362.99 = 545.58 : x - Step 2: Convert to fraction form
987.68/1,362.99 = 545.58/x - Step 3: Cross multiply
987.68x = 1,362.99 × 545.58 - Step 4: Simplify right side
987.68x = 743,620.08 - Step 5: Solve for x
x = 743,620.08/987.68 - Step 6: Final answer
x = 752.90
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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.