Finding the Fourth Proportional to 720,465,457.40, 994,243,181.26 and 390,440,596.40
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Solution
The fourth proportional to 720,465,457.40, 994,243,181.26 and 390,440,596.40 is: 538,808,483.70
Step by Step Solution
- Step 1: Write the proportion equation
720,465,457.40 : 994,243,181.26 = 390,440,596.40 : x - Step 2: Convert to fraction form
720,465,457.40/994,243,181.26 = 390,440,596.40/x - Step 3: Cross multiply
720,465,457.40x = 994,243,181.26 × 390,440,596.40 - Step 4: Simplify right side
720,465,457.40x = 388,192,900,657,787,648 - Step 5: Solve for x
x = 388,192,900,657,787,648/720,465,457.40 - Step 6: Final answer
x = 538,808,483.70
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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.