Finding the Fourth Proportional to 1,121,521,369.20, 1,682,282,053.80 and 540,390,635.70
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Solution
The fourth proportional to 1,121,521,369.20, 1,682,282,053.80 and 540,390,635.70 is: 810,585,953.55
Step by Step Solution
- Step 1: Write the proportion equation
1,121,521,369.20 : 1,682,282,053.80 = 540,390,635.70 : x - Step 2: Convert to fraction form
1,121,521,369.20/1,682,282,053.80 = 540,390,635.70/x - Step 3: Cross multiply
1,121,521,369.20x = 1,682,282,053.80 × 540,390,635.70 - Step 4: Simplify right side
1,121,521,369.20x = 909,089,468,479,683,712 - Step 5: Solve for x
x = 909,089,468,479,683,712/1,121,521,369.20 - Step 6: Final answer
x = 810,585,953.55
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Double scale
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Similar ratio
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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.