Finding the Fourth Proportional to 817,984.42, 1,128,738.09 and 478,386.34
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Solution
The fourth proportional to 817,984.42, 1,128,738.09 and 478,386.34 is: 660,126.12
Step by Step Solution
- Step 1: Write the proportion equation
817,984.42 : 1,128,738.09 = 478,386.34 : x - Step 2: Convert to fraction form
817,984.42/1,128,738.09 = 478,386.34/x - Step 3: Cross multiply
817,984.42x = 1,128,738.09 × 478,386.34 - Step 4: Simplify right side
817,984.42x = 539,972,883,693.69 - Step 5: Solve for x
x = 539,972,883,693.69/817,984.42 - Step 6: Final answer
x = 660,126.12
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.