Finding the Fourth Proportional to 1,121,659.52, 1,547,869.44 and 638,214.08
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Solution
The fourth proportional to 1,121,659.52, 1,547,869.44 and 638,214.08 is: 880,723.65
Step by Step Solution
- Step 1: Write the proportion equation
1,121,659.52 : 1,547,869.44 = 638,214.08 : x - Step 2: Convert to fraction form
1,121,659.52/1,547,869.44 = 638,214.08/x - Step 3: Cross multiply
1,121,659.52x = 1,547,869.44 × 638,214.08 - Step 4: Simplify right side
1,121,659.52x = 987,872,070,609.72 - Step 5: Solve for x
x = 987,872,070,609.72/1,121,659.52 - Step 6: Final answer
x = 880,723.65
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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.