Finding the Fourth Proportional to 873,258,546.80, 1,309,887,820.20 and 436,626,621.20
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Solution
The fourth proportional to 873,258,546.80, 1,309,887,820.20 and 436,626,621.20 is: 654,939,931.80
Step by Step Solution
- Step 1: Write the proportion equation
873,258,546.80 : 1,309,887,820.20 = 436,626,621.20 : x - Step 2: Convert to fraction form
873,258,546.80/1,309,887,820.20 = 436,626,621.20/x - Step 3: Cross multiply
873,258,546.80x = 1,309,887,820.20 × 436,626,621.20 - Step 4: Simplify right side
873,258,546.80x = 571,931,893,084,959,104 - Step 5: Solve for x
x = 571,931,893,084,959,104/873,258,546.80 - Step 6: Final answer
x = 654,939,931.80
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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.