Finding the Fourth Proportional to 1,279,276,137.42, 1,765,492,423.52 and 707,046,879.82
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Solution
The fourth proportional to 1,279,276,137.42, 1,765,492,423.52 and 707,046,879.82 is: 975,775,184.80
Step by Step Solution
- Step 1: Write the proportion equation
1,279,276,137.42 : 1,765,492,423.52 = 707,046,879.82 : x - Step 2: Convert to fraction form
1,279,276,137.42/1,765,492,423.52 = 707,046,879.82/x - Step 3: Cross multiply
1,279,276,137.42x = 1,765,492,423.52 × 707,046,879.82 - Step 4: Simplify right side
1,279,276,137.42x = 1,248,285,909,395,666,176 - Step 5: Solve for x
x = 1,248,285,909,395,666,176/1,279,276,137.42 - Step 6: Final answer
x = 975,775,184.80
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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.