Finding the Fourth Proportional to 1,392,176,777.84, 1,921,165,614.88 and 765,645,433.40
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Solution
The fourth proportional to 1,392,176,777.84, 1,921,165,614.88 and 765,645,433.40 is: 1,056,569,613.32
Step by Step Solution
- Step 1: Write the proportion equation
1,392,176,777.84 : 1,921,165,614.88 = 765,645,433.40 : x - Step 2: Convert to fraction form
1,392,176,777.84/1,921,165,614.88 = 765,645,433.40/x - Step 3: Cross multiply
1,392,176,777.84x = 1,921,165,614.88 × 765,645,433.40 - Step 4: Simplify right side
1,392,176,777.84x = 1,470,931,679,837,975,040 - Step 5: Solve for x
x = 1,470,931,679,837,975,040/1,392,176,777.84 - Step 6: Final answer
x = 1,056,569,613.32
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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.