Finding the Fourth Proportional to 961,803,561.12, 1,327,176,939.72 and 538,440,405.09
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Solution
The fourth proportional to 961,803,561.12, 1,327,176,939.72 and 538,440,405.09 is: 742,985,072.98
Step by Step Solution
- Step 1: Write the proportion equation
961,803,561.12 : 1,327,176,939.72 = 538,440,405.09 : x - Step 2: Convert to fraction form
961,803,561.12/1,327,176,939.72 = 538,440,405.09/x - Step 3: Cross multiply
961,803,561.12x = 1,327,176,939.72 × 538,440,405.09 - Step 4: Simplify right side
961,803,561.12x = 714,605,689,048,943,360 - Step 5: Solve for x
x = 714,605,689,048,943,360/961,803,561.12 - Step 6: Final answer
x = 742,985,072.98
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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.