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Finding the Fourth Proportional to 291,893.13, 399,348.39 and 290,632.86

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Solution

The fourth proportional to 291,893.13, 399,348.39 and 290,632.86 is: 397,624.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,893.13 : 399,348.39 = 290,632.86 : x
  2. Step 2: Convert to fraction form
    291,893.13/399,348.39 = 290,632.86/x
  3. Step 3: Cross multiply
    291,893.13x = 399,348.39 × 290,632.86
  4. Step 4: Simplify right side
    291,893.13x = 116,063,764,722.10
  5. Step 5: Solve for x
    x = 116,063,764,722.10/291,893.13
  6. Step 6: Final answer
    x = 397,624.17

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.