Finding the Fourth Proportional to 260,128.80, 390,415.41 and 185,431.68
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Solution
The fourth proportional to 260,128.80, 390,415.41 and 185,431.68 is: 278,305.92
Step by Step Solution
- Step 1: Write the proportion equation
260,128.80 : 390,415.41 = 185,431.68 : x - Step 2: Convert to fraction form
260,128.80/390,415.41 = 185,431.68/x - Step 3: Cross multiply
260,128.80x = 390,415.41 × 185,431.68 - Step 4: Simplify right side
260,128.80x = 72,395,385,374.19 - Step 5: Solve for x
x = 72,395,385,374.19/260,128.80 - Step 6: Final answer
x = 278,305.92
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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.