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Finding the Fourth Proportional to 352,456.28, 486,390.10 and 191,311.32

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Solution

The fourth proportional to 352,456.28, 486,390.10 and 191,311.32 is: 264,009.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,456.28 : 486,390.10 = 191,311.32 : x
  2. Step 2: Convert to fraction form
    352,456.28/486,390.10 = 191,311.32/x
  3. Step 3: Cross multiply
    352,456.28x = 486,390.10 × 191,311.32
  4. Step 4: Simplify right side
    352,456.28x = 93,051,932,065.93
  5. Step 5: Solve for x
    x = 93,051,932,065.93/352,456.28
  6. Step 6: Final answer
    x = 264,009.86

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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.