Finding the Fourth Proportional to 620,390.92, 855,921.44 and 405,656.68
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Solution
The fourth proportional to 620,390.92, 855,921.44 and 405,656.68 is: 559,663.65
Step by Step Solution
- Step 1: Write the proportion equation
620,390.92 : 855,921.44 = 405,656.68 : x - Step 2: Convert to fraction form
620,390.92/855,921.44 = 405,656.68/x - Step 3: Cross multiply
620,390.92x = 855,921.44 × 405,656.68 - Step 4: Simplify right side
620,390.92x = 347,210,249,691.22 - Step 5: Solve for x
x = 347,210,249,691.22/620,390.92 - Step 6: Final answer
x = 559,663.65
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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.