Finding the Fourth Proportional to 687,815,541.12, 949,176,052.74 and 390,455,187.24
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Solution
The fourth proportional to 687,815,541.12, 949,176,052.74 and 390,455,187.24 is: 538,822,825.66
Step by Step Solution
- Step 1: Write the proportion equation
687,815,541.12 : 949,176,052.74 = 390,455,187.24 : x - Step 2: Convert to fraction form
687,815,541.12/949,176,052.74 = 390,455,187.24/x - Step 3: Cross multiply
687,815,541.12x = 949,176,052.74 × 390,455,187.24 - Step 4: Simplify right side
687,815,541.12x = 370,610,713,396,320,832 - Step 5: Solve for x
x = 370,610,713,396,320,832/687,815,541.12 - Step 6: Final answer
x = 538,822,825.66
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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.