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Finding the Fourth Proportional to 203,505.40, 305,185.20 and 103,632.40

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Solution

The fourth proportional to 203,505.40, 305,185.20 and 103,632.40 is: 155,411.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,505.40 : 305,185.20 = 103,632.40 : x
  2. Step 2: Convert to fraction form
    203,505.40/305,185.20 = 103,632.40/x
  3. Step 3: Cross multiply
    203,505.40x = 305,185.20 × 103,632.40
  4. Step 4: Simplify right side
    203,505.40x = 31,627,074,720.48
  5. Step 5: Solve for x
    x = 31,627,074,720.48/203,505.40
  6. Step 6: Final answer
    x = 155,411.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.