Finding the Fourth Proportional to 1,225,201.78, 1,690,530.69 and 715,805.74
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Solution
The fourth proportional to 1,225,201.78, 1,690,530.69 and 715,805.74 is: 987,667.17
Step by Step Solution
- Step 1: Write the proportion equation
1,225,201.78 : 1,690,530.69 = 715,805.74 : x - Step 2: Convert to fraction form
1,225,201.78/1,690,530.69 = 715,805.74/x - Step 3: Cross multiply
1,225,201.78x = 1,690,530.69 × 715,805.74 - Step 4: Simplify right side
1,225,201.78x = 1,210,091,571,548.16 - Step 5: Solve for x
x = 1,210,091,571,548.16/1,225,201.78 - Step 6: Final answer
x = 987,667.17
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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.