Finding the Fourth Proportional to 1,121,637.12, 1,547,805.24 and 638,157.12
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Solution
The fourth proportional to 1,121,637.12, 1,547,805.24 and 638,157.12 is: 880,626.11
Step by Step Solution
- Step 1: Write the proportion equation
1,121,637.12 : 1,547,805.24 = 638,157.12 : x - Step 2: Convert to fraction form
1,121,637.12/1,547,805.24 = 638,157.12/x - Step 3: Cross multiply
1,121,637.12x = 1,547,805.24 × 638,157.12 - Step 4: Simplify right side
1,121,637.12x = 987,742,934,279.31 - Step 5: Solve for x
x = 987,742,934,279.31/1,121,637.12 - Step 6: Final answer
x = 880,626.11
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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.