Finding the Fourth Proportional to 1,209,405.68, 1,668,421.44 and 779,823.80
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Solution
The fourth proportional to 1,209,405.68, 1,668,421.44 and 779,823.80 is: 1,075,796.79
Step by Step Solution
- Step 1: Write the proportion equation
1,209,405.68 : 1,668,421.44 = 779,823.80 : x - Step 2: Convert to fraction form
1,209,405.68/1,668,421.44 = 779,823.80/x - Step 3: Cross multiply
1,209,405.68x = 1,668,421.44 × 779,823.80 - Step 4: Simplify right side
1,209,405.68x = 1,301,074,747,342.27 - Step 5: Solve for x
x = 1,301,074,747,342.27/1,209,405.68 - Step 6: Final answer
x = 1,075,796.79
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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.