Finding the Fourth Proportional to 1,121,599.12, 1,547,752.80 and 638,119.12
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Solution
The fourth proportional to 1,121,599.12, 1,547,752.80 and 638,119.12 is: 880,573.67
Step by Step Solution
- Step 1: Write the proportion equation
1,121,599.12 : 1,547,752.80 = 638,119.12 : x - Step 2: Convert to fraction form
1,121,599.12/1,547,752.80 = 638,119.12/x - Step 3: Cross multiply
1,121,599.12x = 1,547,752.80 × 638,119.12 - Step 4: Simplify right side
1,121,599.12x = 987,650,654,713.54 - Step 5: Solve for x
x = 987,650,654,713.54/1,121,599.12 - Step 6: Final answer
x = 880,573.67
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1.5x scale
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.