Finding the Fourth Proportional to 817,842.21, 1,128,659.70 and 455,289.57
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Solution
The fourth proportional to 817,842.21, 1,128,659.70 and 455,289.57 is: 628,320.45
Step by Step Solution
- Step 1: Write the proportion equation
817,842.21 : 1,128,659.70 = 455,289.57 : x - Step 2: Convert to fraction form
817,842.21/1,128,659.70 = 455,289.57/x - Step 3: Cross multiply
817,842.21x = 1,128,659.70 × 455,289.57 - Step 4: Simplify right side
817,842.21x = 513,866,989,489.33 - Step 5: Solve for x
x = 513,866,989,489.33/817,842.21 - Step 6: Final answer
x = 628,320.45
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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.