Finding the Fourth Proportional to 825,540,987.07, 1,139,212,178.58 and 449,199,052.75
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Solution
The fourth proportional to 825,540,987.07, 1,139,212,178.58 and 449,199,052.75 is: 619,875,983.77
Step by Step Solution
- Step 1: Write the proportion equation
825,540,987.07 : 1,139,212,178.58 = 449,199,052.75 : x - Step 2: Convert to fraction form
825,540,987.07/1,139,212,178.58 = 449,199,052.75/x - Step 3: Cross multiply
825,540,987.07x = 1,139,212,178.58 × 449,199,052.75 - Step 4: Simplify right side
825,540,987.07x = 511,733,031,499,399,808 - Step 5: Solve for x
x = 511,733,031,499,399,808/825,540,987.07 - Step 6: Final answer
x = 619,875,983.77
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Double scale
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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.