Finding the Fourth Proportional to 1,555,015,221, 2,145,965,794.74 and 859,698,986.76
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Solution
The fourth proportional to 1,555,015,221, 2,145,965,794.74 and 859,698,986.76 is: 1,186,409,364.00
Step by Step Solution
- Step 1: Write the proportion equation
1,555,015,221 : 2,145,965,794.74 = 859,698,986.76 : x - Step 2: Convert to fraction form
1,555,015,221/2,145,965,794.74 = 859,698,986.76/x - Step 3: Cross multiply
1,555,015,221x = 2,145,965,794.74 × 859,698,986.76 - Step 4: Simplify right side
1,555,015,221x = 1,844,884,619,359,596,032 - Step 5: Solve for x
x = 1,844,884,619,359,596,032/1,555,015,221 - Step 6: Final answer
x = 1,186,409,364.00
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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.