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Finding the Fourth Proportional to 258,221.64, 356,379.28 and 145,044.36

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Solution

The fourth proportional to 258,221.64, 356,379.28 and 145,044.36 is: 200,179.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,221.64 : 356,379.28 = 145,044.36 : x
  2. Step 2: Convert to fraction form
    258,221.64/356,379.28 = 145,044.36/x
  3. Step 3: Cross multiply
    258,221.64x = 356,379.28 × 145,044.36
  4. Step 4: Simplify right side
    258,221.64x = 51,690,804,584.86
  5. Step 5: Solve for x
    x = 51,690,804,584.86/258,221.64
  6. Step 6: Final answer
    x = 200,179.99

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1.5x scale

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.