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Finding the Fourth Proportional to 393,353.10, 590,032.89 and 112,879.26

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Solution

The fourth proportional to 393,353.10, 590,032.89 and 112,879.26 is: 169,319.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,353.10 : 590,032.89 = 112,879.26 : x
  2. Step 2: Convert to fraction form
    393,353.10/590,032.89 = 112,879.26/x
  3. Step 3: Cross multiply
    393,353.10x = 590,032.89 × 112,879.26
  4. Step 4: Simplify right side
    393,353.10x = 66,602,475,998.86
  5. Step 5: Solve for x
    x = 66,602,475,998.86/393,353.10
  6. Step 6: Final answer
    x = 169,319.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.