Finding the Fourth Proportional to 1,440,078,913.62, 1,987,298,320.77 and 813,535,956.18
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Solution
The fourth proportional to 1,440,078,913.62, 1,987,298,320.77 and 813,535,956.18 is: 1,122,673,642.61
Step by Step Solution
- Step 1: Write the proportion equation
1,440,078,913.62 : 1,987,298,320.77 = 813,535,956.18 : x - Step 2: Convert to fraction form
1,440,078,913.62/1,987,298,320.77 = 813,535,956.18/x - Step 3: Cross multiply
1,440,078,913.62x = 1,987,298,320.77 × 813,535,956.18 - Step 4: Simplify right side
1,440,078,913.62x = 1,616,738,639,602,530,304 - Step 5: Solve for x
x = 1,616,738,639,602,530,304/1,440,078,913.62 - Step 6: Final answer
x = 1,122,673,642.61
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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.