Finding the Fourth Proportional to 611,923,863.70, 917,885,795.55 and 490,991,511.70
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Solution
The fourth proportional to 611,923,863.70, 917,885,795.55 and 490,991,511.70 is: 736,487,267.55
Step by Step Solution
- Step 1: Write the proportion equation
611,923,863.70 : 917,885,795.55 = 490,991,511.70 : x - Step 2: Convert to fraction form
611,923,863.70/917,885,795.55 = 490,991,511.70/x - Step 3: Cross multiply
611,923,863.70x = 917,885,795.55 × 490,991,511.70 - Step 4: Simplify right side
611,923,863.70x = 450,674,134,325,051,584 - Step 5: Solve for x
x = 450,674,134,325,051,584/611,923,863.70 - Step 6: Final answer
x = 736,487,267.55
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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.