Finding the Fourth Proportional to 430,910.74, 646,365.40 and 430,287.44
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Solution
The fourth proportional to 430,910.74, 646,365.40 and 430,287.44 is: 645,430.45
Step by Step Solution
- Step 1: Write the proportion equation
430,910.74 : 646,365.40 = 430,287.44 : x - Step 2: Convert to fraction form
430,910.74/646,365.40 = 430,287.44/x - Step 3: Cross multiply
430,910.74x = 646,365.40 × 430,287.44 - Step 4: Simplify right side
430,910.74x = 278,122,913,270.58 - Step 5: Solve for x
x = 278,122,913,270.58/430,910.74 - Step 6: Final answer
x = 645,430.45
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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.