Finding the Fourth Proportional to 664,848,211.20, 997,272,316.80 and 645,716,335.20
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Solution
The fourth proportional to 664,848,211.20, 997,272,316.80 and 645,716,335.20 is: 968,574,502.80
Step by Step Solution
- Step 1: Write the proportion equation
664,848,211.20 : 997,272,316.80 = 645,716,335.20 : x - Step 2: Convert to fraction form
664,848,211.20/997,272,316.80 = 645,716,335.20/x - Step 3: Cross multiply
664,848,211.20x = 997,272,316.80 × 645,716,335.20 - Step 4: Simplify right side
664,848,211.20x = 643,955,025,600,509,440 - Step 5: Solve for x
x = 643,955,025,600,509,440/664,848,211.20 - Step 6: Final answer
x = 968,574,502.80
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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.