Finding the Fourth Proportional to 712,932,139.80, 1,069,398,209.70 and 687,104,107.20
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Solution
The fourth proportional to 712,932,139.80, 1,069,398,209.70 and 687,104,107.20 is: 1,030,656,160.80
Step by Step Solution
- Step 1: Write the proportion equation
712,932,139.80 : 1,069,398,209.70 = 687,104,107.20 : x - Step 2: Convert to fraction form
712,932,139.80/1,069,398,209.70 = 687,104,107.20/x - Step 3: Cross multiply
712,932,139.80x = 1,069,398,209.70 × 687,104,107.20 - Step 4: Simplify right side
712,932,139.80x = 734,787,902,117,196,928 - Step 5: Solve for x
x = 734,787,902,117,196,928/712,932,139.80 - Step 6: Final answer
x = 1,030,656,160.80
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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.