Finding the Fourth Proportional to 1,820,578,750.47, 2,512,398,678.84 and 985,203,320.76
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Solution
The fourth proportional to 1,820,578,750.47, 2,512,398,678.84 and 985,203,320.76 is: 1,359,580,584.38
Step by Step Solution
- Step 1: Write the proportion equation
1,820,578,750.47 : 2,512,398,678.84 = 985,203,320.76 : x - Step 2: Convert to fraction form
1,820,578,750.47/2,512,398,678.84 = 985,203,320.76/x - Step 3: Cross multiply
1,820,578,750.47x = 2,512,398,678.84 × 985,203,320.76 - Step 4: Simplify right side
1,820,578,750.47x = 2,475,223,521,466,204,672 - Step 5: Solve for x
x = 2,475,223,521,466,204,672/1,820,578,750.47 - Step 6: Final answer
x = 1,359,580,584.38
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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.