Finding the Fourth Proportional to 430,886.40, 646,432.14 and 217,129.08
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Solution
The fourth proportional to 430,886.40, 646,432.14 and 217,129.08 is: 325,745.29
Step by Step Solution
- Step 1: Write the proportion equation
430,886.40 : 646,432.14 = 217,129.08 : x - Step 2: Convert to fraction form
430,886.40/646,432.14 = 217,129.08/x - Step 3: Cross multiply
430,886.40x = 646,432.14 × 217,129.08 - Step 4: Simplify right side
430,886.40x = 140,359,215,840.63 - Step 5: Solve for x
x = 140,359,215,840.63/430,886.40 - Step 6: Final answer
x = 325,745.29
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1.5x scale
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.