Finding the Fourth Proportional to 640,225,968.05, 883,241,295.63 and 428,600,980.96
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Solution
The fourth proportional to 640,225,968.05, 883,241,295.63 and 428,600,980.96 is: 591,288,239.82
Step by Step Solution
- Step 1: Write the proportion equation
640,225,968.05 : 883,241,295.63 = 428,600,980.96 : x - Step 2: Convert to fraction form
640,225,968.05/883,241,295.63 = 428,600,980.96/x - Step 3: Cross multiply
640,225,968.05x = 883,241,295.63 × 428,600,980.96 - Step 4: Simplify right side
640,225,968.05x = 378,558,085,735,596,224 - Step 5: Solve for x
x = 378,558,085,735,596,224/640,225,968.05 - Step 6: Final answer
x = 591,288,239.82
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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.