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Finding the Fourth Proportional to 225,319.25, 310,976.78 and 128,554.67

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Solution

The fourth proportional to 225,319.25, 310,976.78 and 128,554.67 is: 177,426.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,319.25 : 310,976.78 = 128,554.67 : x
  2. Step 2: Convert to fraction form
    225,319.25/310,976.78 = 128,554.67/x
  3. Step 3: Cross multiply
    225,319.25x = 310,976.78 × 128,554.67
  4. Step 4: Simplify right side
    225,319.25x = 39,977,517,330.56
  5. Step 5: Solve for x
    x = 39,977,517,330.56/225,319.25
  6. Step 6: Final answer
    x = 177,426.11

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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.