Finding the Fourth Proportional to 415,425.40, 623,138.10 and 257,831.80
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Solution
The fourth proportional to 415,425.40, 623,138.10 and 257,831.80 is: 386,747.70
Step by Step Solution
- Step 1: Write the proportion equation
415,425.40 : 623,138.10 = 257,831.80 : x - Step 2: Convert to fraction form
415,425.40/623,138.10 = 257,831.80/x - Step 3: Cross multiply
415,425.40x = 623,138.10 × 257,831.80 - Step 4: Simplify right side
415,425.40x = 160,664,817,971.58 - Step 5: Solve for x
x = 160,664,817,971.58/415,425.40 - Step 6: Final answer
x = 386,747.70
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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.