Finding the Fourth Proportional to 1,174,965.12, 1,621,460.16 and 638,421.12
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Solution
The fourth proportional to 1,174,965.12, 1,621,460.16 and 638,421.12 is: 881,025.65
Step by Step Solution
- Step 1: Write the proportion equation
1,174,965.12 : 1,621,460.16 = 638,421.12 : x - Step 2: Convert to fraction form
1,174,965.12/1,621,460.16 = 638,421.12/x - Step 3: Cross multiply
1,174,965.12x = 1,621,460.16 × 638,421.12 - Step 4: Simplify right side
1,174,965.12x = 1,035,174,411,382.58 - Step 5: Solve for x
x = 1,035,174,411,382.58/1,174,965.12 - Step 6: Final answer
x = 881,025.65
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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.