Finding the Fourth Proportional to 689,848,020.80, 1,034,772,031.20 and 472,169,787.20
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Solution
The fourth proportional to 689,848,020.80, 1,034,772,031.20 and 472,169,787.20 is: 708,254,680.80
Step by Step Solution
- Step 1: Write the proportion equation
689,848,020.80 : 1,034,772,031.20 = 472,169,787.20 : x - Step 2: Convert to fraction form
689,848,020.80/1,034,772,031.20 = 472,169,787.20/x - Step 3: Cross multiply
689,848,020.80x = 1,034,772,031.20 × 472,169,787.20 - Step 4: Simplify right side
689,848,020.80x = 488,588,089,772,215,744 - Step 5: Solve for x
x = 488,588,089,772,215,744/689,848,020.80 - Step 6: Final answer
x = 708,254,680.80
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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.