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Finding the Fourth Proportional to 634,086.32, 875,129.24 and 392,446.72

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Solution

The fourth proportional to 634,086.32, 875,129.24 and 392,446.72 is: 541,632.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,086.32 : 875,129.24 = 392,446.72 : x
  2. Step 2: Convert to fraction form
    634,086.32/875,129.24 = 392,446.72/x
  3. Step 3: Cross multiply
    634,086.32x = 875,129.24 × 392,446.72
  4. Step 4: Simplify right side
    634,086.32x = 343,441,599,814.09
  5. Step 5: Solve for x
    x = 343,441,599,814.09/634,086.32
  6. Step 6: Final answer
    x = 541,632.25

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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.