Finding the Fourth Proportional to 1,279,419,014.80, 1,919,128,507.80 and 310,070,630.80
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Solution
The fourth proportional to 1,279,419,014.80, 1,919,128,507.80 and 310,070,630.80 is: 465,105,942.71
Step by Step Solution
- Step 1: Write the proportion equation
1,279,419,014.80 : 1,919,128,507.80 = 310,070,630.80 : x - Step 2: Convert to fraction form
1,279,419,014.80/1,919,128,507.80 = 310,070,630.80/x - Step 3: Cross multiply
1,279,419,014.80x = 1,919,128,507.80 × 310,070,630.80 - Step 4: Simplify right side
1,279,419,014.80x = 595,065,386,999,808,768 - Step 5: Solve for x
x = 595,065,386,999,808,768/1,279,419,014.80 - Step 6: Final answer
x = 465,105,942.71
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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.