Finding the Fourth Proportional to 891,888,911.34, 1,230,529,020.47 and 515,408,343.09
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Solution
The fourth proportional to 891,888,911.34, 1,230,529,020.47 and 515,408,343.09 is: 711,103,048.26
Step by Step Solution
- Step 1: Write the proportion equation
891,888,911.34 : 1,230,529,020.47 = 515,408,343.09 : x - Step 2: Convert to fraction form
891,888,911.34/1,230,529,020.47 = 515,408,343.09/x - Step 3: Cross multiply
891,888,911.34x = 1,230,529,020.47 × 515,408,343.09 - Step 4: Simplify right side
891,888,911.34x = 634,224,923,559,370,496 - Step 5: Solve for x
x = 634,224,923,559,370,496/891,888,911.34 - Step 6: Final answer
x = 711,103,048.26
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Double scale
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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.