Finding the Fourth Proportional to 420,909.70, 631,364.55 and 420,909.70
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Solution
The fourth proportional to 420,909.70, 631,364.55 and 420,909.70 is: 631,364.55
Step by Step Solution
- Step 1: Write the proportion equation
420,909.70 : 631,364.55 = 420,909.70 : x - Step 2: Convert to fraction form
420,909.70/631,364.55 = 420,909.70/x - Step 3: Cross multiply
420,909.70x = 631,364.55 × 420,909.70 - Step 4: Simplify right side
420,909.70x = 265,747,463,331.14 - Step 5: Solve for x
x = 265,747,463,331.14/420,909.70 - Step 6: Final answer
x = 631,364.55
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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.