Finding the Fourth Proportional to 687,815,540.12, 949,176,051.36 and 390,455,186.24
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Solution
The fourth proportional to 687,815,540.12, 949,176,051.36 and 390,455,186.24 is: 538,822,824.28
Step by Step Solution
- Step 1: Write the proportion equation
687,815,540.12 : 949,176,051.36 = 390,455,186.24 : x - Step 2: Convert to fraction form
687,815,540.12/949,176,051.36 = 390,455,186.24/x - Step 3: Cross multiply
687,815,540.12x = 949,176,051.36 × 390,455,186.24 - Step 4: Simplify right side
687,815,540.12x = 370,610,711,908,316,608 - Step 5: Solve for x
x = 370,610,711,908,316,608/687,815,540.12 - Step 6: Final answer
x = 538,822,824.28
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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.