Finding the Fourth Proportional to 2,878,692,781.05, 4,318,039,139.18 and 697,658,917.05
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Solution
The fourth proportional to 2,878,692,781.05, 4,318,039,139.18 and 697,658,917.05 is: 1,046,488,367.72
Step by Step Solution
- Step 1: Write the proportion equation
2,878,692,781.05 : 4,318,039,139.18 = 697,658,917.05 : x - Step 2: Convert to fraction form
2,878,692,781.05/4,318,039,139.18 = 697,658,917.05/x - Step 3: Cross multiply
2,878,692,781.05x = 4,318,039,139.18 × 697,658,917.05 - Step 4: Simplify right side
2,878,692,781.05x = 3,012,518,509,619,832,832 - Step 5: Solve for x
x = 3,012,518,509,619,832,832/2,878,692,781.05 - Step 6: Final answer
x = 1,046,488,367.72
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.