Finding the Fourth Proportional to 438,233.16, 657,448.21 and 138,731.70
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Solution
The fourth proportional to 438,233.16, 657,448.21 and 138,731.70 is: 208,128.72
Step by Step Solution
- Step 1: Write the proportion equation
438,233.16 : 657,448.21 = 138,731.70 : x - Step 2: Convert to fraction form
438,233.16/657,448.21 = 138,731.70/x - Step 3: Cross multiply
438,233.16x = 657,448.21 × 138,731.70 - Step 4: Simplify right side
438,233.16x = 91,208,907,835.26 - Step 5: Solve for x
x = 91,208,907,835.26/438,233.16 - Step 6: Final answer
x = 208,128.72
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.