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Finding the Fourth Proportional to 225,688.80, 311,308.92 and 145,220.88

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Solution

The fourth proportional to 225,688.80, 311,308.92 and 145,220.88 is: 200,313.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,688.80 : 311,308.92 = 145,220.88 : x
  2. Step 2: Convert to fraction form
    225,688.80/311,308.92 = 145,220.88/x
  3. Step 3: Cross multiply
    225,688.80x = 311,308.92 × 145,220.88
  4. Step 4: Simplify right side
    225,688.80x = 45,208,555,314.25
  5. Step 5: Solve for x
    x = 45,208,555,314.25/225,688.80
  6. Step 6: Final answer
    x = 200,313.69

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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.