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Finding the Fourth Proportional to 400,879.64, 553,260.48 and 231,119.84

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Solution

The fourth proportional to 400,879.64, 553,260.48 and 231,119.84 is: 318,972.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,879.64 : 553,260.48 = 231,119.84 : x
  2. Step 2: Convert to fraction form
    400,879.64/553,260.48 = 231,119.84/x
  3. Step 3: Cross multiply
    400,879.64x = 553,260.48 × 231,119.84
  4. Step 4: Simplify right side
    400,879.64x = 127,869,473,615.92
  5. Step 5: Solve for x
    x = 127,869,473,615.92/400,879.64
  6. Step 6: Final answer
    x = 318,972.23

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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.