Finding the Fourth Proportional to 420,905.70, 631,358.55 and 420,905.70
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Solution
The fourth proportional to 420,905.70, 631,358.55 and 420,905.70 is: 631,358.55
Step by Step Solution
- Step 1: Write the proportion equation
420,905.70 : 631,358.55 = 420,905.70 : x - Step 2: Convert to fraction form
420,905.70/631,358.55 = 420,905.70/x - Step 3: Cross multiply
420,905.70x = 631,358.55 × 420,905.70 - Step 4: Simplify right side
420,905.70x = 265,742,412,438.74 - Step 5: Solve for x
x = 265,742,412,438.74/420,905.70 - Step 6: Final answer
x = 631,358.55
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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.