Finding the Fourth Proportional to 687,708,755.70, 1,031,563,133.55 and 612,461,958.90
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Solution
The fourth proportional to 687,708,755.70, 1,031,563,133.55 and 612,461,958.90 is: 918,692,938.35
Step by Step Solution
- Step 1: Write the proportion equation
687,708,755.70 : 1,031,563,133.55 = 612,461,958.90 : x - Step 2: Convert to fraction form
687,708,755.70/1,031,563,133.55 = 612,461,958.90/x - Step 3: Cross multiply
687,708,755.70x = 1,031,563,133.55 × 612,461,958.90 - Step 4: Simplify right side
687,708,755.70x = 631,793,177,503,055,232 - Step 5: Solve for x
x = 631,793,177,503,055,232/687,708,755.70 - Step 6: Final answer
x = 918,692,938.35
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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.