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Finding the Fourth Proportional to 258,270.76, 356,422.82 and 143,551.72

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Solution

The fourth proportional to 258,270.76, 356,422.82 and 143,551.72 is: 198,106.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,270.76 : 356,422.82 = 143,551.72 : x
  2. Step 2: Convert to fraction form
    258,270.76/356,422.82 = 143,551.72/x
  3. Step 3: Cross multiply
    258,270.76x = 356,422.82 × 143,551.72
  4. Step 4: Simplify right side
    258,270.76x = 51,165,108,858.25
  5. Step 5: Solve for x
    x = 51,165,108,858.25/258,270.76
  6. Step 6: Final answer
    x = 198,106.47

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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.