Finding the Fourth Proportional to 855,479,910.70, 1,283,219,866.05 and 310,239,232.30
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Solution
The fourth proportional to 855,479,910.70, 1,283,219,866.05 and 310,239,232.30 is: 465,358,848.45
Step by Step Solution
- Step 1: Write the proportion equation
855,479,910.70 : 1,283,219,866.05 = 310,239,232.30 : x - Step 2: Convert to fraction form
855,479,910.70/1,283,219,866.05 = 310,239,232.30/x - Step 3: Cross multiply
855,479,910.70x = 1,283,219,866.05 × 310,239,232.30 - Step 4: Simplify right side
855,479,910.70x = 398,105,146,115,460,864 - Step 5: Solve for x
x = 398,105,146,115,460,864/855,479,910.70 - Step 6: Final answer
x = 465,358,848.45
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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.