Finding the Fourth Proportional to 430,885.40, 646,430.64 and 217,128.08
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Solution
The fourth proportional to 430,885.40, 646,430.64 and 217,128.08 is: 325,743.79
Step by Step Solution
- Step 1: Write the proportion equation
430,885.40 : 646,430.64 = 217,128.08 : x - Step 2: Convert to fraction form
430,885.40/646,430.64 = 217,128.08/x - Step 3: Cross multiply
430,885.40x = 646,430.64 × 217,128.08 - Step 4: Simplify right side
430,885.40x = 140,358,243,716.37 - Step 5: Solve for x
x = 140,358,243,716.37/430,885.40 - Step 6: Final answer
x = 325,743.79
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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.