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Finding the Fourth Proportional to 587,912.64, 811,314.24 and 319,640.64

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Solution

The fourth proportional to 587,912.64, 811,314.24 and 319,640.64 is: 441,101.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,912.64 : 811,314.24 = 319,640.64 : x
  2. Step 2: Convert to fraction form
    587,912.64/811,314.24 = 319,640.64/x
  3. Step 3: Cross multiply
    587,912.64x = 811,314.24 × 319,640.64
  4. Step 4: Simplify right side
    587,912.64x = 259,329,002,914.71
  5. Step 5: Solve for x
    x = 259,329,002,914.71/587,912.64
  6. Step 6: Final answer
    x = 441,101.25

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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.