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Finding the Fourth Proportional to 425,469.51, 587,139.99 and 231,878.70

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Solution

The fourth proportional to 425,469.51, 587,139.99 and 231,878.70 is: 319,988.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,469.51 : 587,139.99 = 231,878.70 : x
  2. Step 2: Convert to fraction form
    425,469.51/587,139.99 = 231,878.70/x
  3. Step 3: Cross multiply
    425,469.51x = 587,139.99 × 231,878.70
  4. Step 4: Simplify right side
    425,469.51x = 136,145,258,033.99
  5. Step 5: Solve for x
    x = 136,145,258,033.99/425,469.51
  6. Step 6: Final answer
    x = 319,988.28

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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.