Finding the Fourth Proportional to 720,465,259.20, 994,242,908.00 and 390,440,398.20
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Solution
The fourth proportional to 720,465,259.20, 994,242,908.00 and 390,440,398.20 is: 538,808,210.32
Step by Step Solution
- Step 1: Write the proportion equation
720,465,259.20 : 994,242,908.00 = 390,440,398.20 : x - Step 2: Convert to fraction form
720,465,259.20/994,242,908.00 = 390,440,398.20/x - Step 3: Cross multiply
720,465,259.20x = 994,242,908.00 × 390,440,398.20 - Step 4: Simplify right side
720,465,259.20x = 388,192,596,905,093,760 - Step 5: Solve for x
x = 388,192,596,905,093,760/720,465,259.20 - Step 6: Final answer
x = 538,808,210.32
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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.