Finding the Fourth Proportional to 715,211.64, 1,072,489.68 and 427,155.12
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Solution
The fourth proportional to 715,211.64, 1,072,489.68 and 427,155.12 is: 640,536.92
Step by Step Solution
- Step 1: Write the proportion equation
715,211.64 : 1,072,489.68 = 427,155.12 : x - Step 2: Convert to fraction form
715,211.64/1,072,489.68 = 427,155.12/x - Step 3: Cross multiply
715,211.64x = 1,072,489.68 × 427,155.12 - Step 4: Simplify right side
715,211.64x = 458,119,457,959.16 - Step 5: Solve for x
x = 458,119,457,959.16/715,211.64 - Step 6: Final answer
x = 640,536.92
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.