Finding the Fourth Proportional to 663,854,739.98, 916,239,490.68 and 395,947,764.86
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Solution
The fourth proportional to 663,854,739.98, 916,239,490.68 and 395,947,764.86 is: 546,479,457.87
Step by Step Solution
- Step 1: Write the proportion equation
663,854,739.98 : 916,239,490.68 = 395,947,764.86 : x - Step 2: Convert to fraction form
663,854,739.98/916,239,490.68 = 395,947,764.86/x - Step 3: Cross multiply
663,854,739.98x = 916,239,490.68 × 395,947,764.86 - Step 4: Simplify right side
663,854,739.98x = 362,782,978,411,210,816 - Step 5: Solve for x
x = 362,782,978,411,210,816/663,854,739.98 - Step 6: Final answer
x = 546,479,457.87
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.