Finding the Fourth Proportional to 1,078,863,937.80, 1,487,821,768.56 and 716,116,351.20
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Solution
The fourth proportional to 1,078,863,937.80, 1,487,821,768.56 and 716,116,351.20 is: 987,569,848.99
Step by Step Solution
- Step 1: Write the proportion equation
1,078,863,937.80 : 1,487,821,768.56 = 716,116,351.20 : x - Step 2: Convert to fraction form
1,078,863,937.80/1,487,821,768.56 = 716,116,351.20/x - Step 3: Cross multiply
1,078,863,937.80x = 1,487,821,768.56 × 716,116,351.20 - Step 4: Simplify right side
1,078,863,937.80x = 1,065,453,496,137,118,080 - Step 5: Solve for x
x = 1,065,453,496,137,118,080/1,078,863,937.80 - Step 6: Final answer
x = 987,569,848.99
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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.