Finding the Fourth Proportional to 720,465,489.64, 994,243,226.16 and 390,440,628.64
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Solution
The fourth proportional to 720,465,489.64, 994,243,226.16 and 390,440,628.64 is: 538,808,528.41
Step by Step Solution
- Step 1: Write the proportion equation
720,465,489.64 : 994,243,226.16 = 390,440,628.64 : x - Step 2: Convert to fraction form
720,465,489.64/994,243,226.16 = 390,440,628.64/x - Step 3: Cross multiply
720,465,489.64x = 994,243,226.16 × 390,440,628.64 - Step 4: Simplify right side
720,465,489.64x = 388,192,950,242,972,096 - Step 5: Solve for x
x = 388,192,950,242,972,096/720,465,489.64 - Step 6: Final answer
x = 538,808,528.41
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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.