Finding the Fourth Proportional to 817,671.98, 1,128,412.42 and 455,115.98
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Solution
The fourth proportional to 817,671.98, 1,128,412.42 and 455,115.98 is: 628,074.02
Step by Step Solution
- Step 1: Write the proportion equation
817,671.98 : 1,128,412.42 = 455,115.98 : x - Step 2: Convert to fraction form
817,671.98/1,128,412.42 = 455,115.98/x - Step 3: Cross multiply
817,671.98x = 1,128,412.42 × 455,115.98 - Step 4: Simplify right side
817,671.98x = 513,558,524,372.47 - Step 5: Solve for x
x = 513,558,524,372.47/817,671.98 - Step 6: Final answer
x = 628,074.02
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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.