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Finding the Fourth Proportional to 256,991.40, 354,645.06 and 143,815.08

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Solution

The fourth proportional to 256,991.40, 354,645.06 and 143,815.08 is: 198,463.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,991.40 : 354,645.06 = 143,815.08 : x
  2. Step 2: Convert to fraction form
    256,991.40/354,645.06 = 143,815.08/x
  3. Step 3: Cross multiply
    256,991.40x = 354,645.06 × 143,815.08
  4. Step 4: Simplify right side
    256,991.40x = 51,003,307,675.50
  5. Step 5: Solve for x
    x = 51,003,307,675.50/256,991.40
  6. Step 6: Final answer
    x = 198,463.09

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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.