Finding the Fourth Proportional to 1,321,149,979.68, 1,980,415,970.91 and 620,387,682.18
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Solution
The fourth proportional to 1,321,149,979.68, 1,980,415,970.91 and 620,387,682.18 is: 929,966,841.65
Step by Step Solution
- Step 1: Write the proportion equation
1,321,149,979.68 : 1,980,415,970.91 = 620,387,682.18 : x - Step 2: Convert to fraction form
1,321,149,979.68/1,980,415,970.91 = 620,387,682.18/x - Step 3: Cross multiply
1,321,149,979.68x = 1,980,415,970.91 × 620,387,682.18 - Step 4: Simplify right side
1,321,149,979.68x = 1,228,625,673,945,109,248 - Step 5: Solve for x
x = 1,228,625,673,945,109,248/1,321,149,979.68 - Step 6: Final answer
x = 929,966,841.65
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1.5x scale
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.