Finding the Fourth Proportional to 840,118,187.20, 1,260,177,280.80 and 726,871,979.20
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Solution
The fourth proportional to 840,118,187.20, 1,260,177,280.80 and 726,871,979.20 is: 1,090,307,968.80
Step by Step Solution
- Step 1: Write the proportion equation
840,118,187.20 : 1,260,177,280.80 = 726,871,979.20 : x - Step 2: Convert to fraction form
840,118,187.20/1,260,177,280.80 = 726,871,979.20/x - Step 3: Cross multiply
840,118,187.20x = 1,260,177,280.80 × 726,871,979.20 - Step 4: Simplify right side
840,118,187.20x = 915,987,554,237,970,176 - Step 5: Solve for x
x = 915,987,554,237,970,176/840,118,187.20 - Step 6: Final answer
x = 1,090,307,968.80
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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.