Finding the Fourth Proportional to 717,109,858.35, 989,598,165.97 and 438,630,925.23
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Solution
The fourth proportional to 717,109,858.35, 989,598,165.97 and 438,630,925.23 is: 605,302,456.93
Step by Step Solution
- Step 1: Write the proportion equation
717,109,858.35 : 989,598,165.97 = 438,630,925.23 : x - Step 2: Convert to fraction form
717,109,858.35/989,598,165.97 = 438,630,925.23/x - Step 3: Cross multiply
717,109,858.35x = 989,598,165.97 × 438,630,925.23 - Step 4: Simplify right side
717,109,858.35x = 434,068,359,145,332,224 - Step 5: Solve for x
x = 434,068,359,145,332,224/717,109,858.35 - Step 6: Final answer
x = 605,302,456.93
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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.