Finding the Fourth Proportional to 765,312,418.75, 1,056,164,583.21 and 430,806,525.97
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Solution
The fourth proportional to 765,312,418.75, 1,056,164,583.21 and 430,806,525.97 is: 594,531,832.75
Step by Step Solution
- Step 1: Write the proportion equation
765,312,418.75 : 1,056,164,583.21 = 430,806,525.97 : x - Step 2: Convert to fraction form
765,312,418.75/1,056,164,583.21 = 430,806,525.97/x - Step 3: Cross multiply
765,312,418.75x = 1,056,164,583.21 × 430,806,525.97 - Step 4: Simplify right side
765,312,418.75x = 455,002,594,945,253,120 - Step 5: Solve for x
x = 455,002,594,945,253,120/765,312,418.75 - Step 6: Final answer
x = 594,531,832.75
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Double scale
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1.5x scale
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.