Home / 427,027.32-640,323.36-142,615.56

Finding the Fourth Proportional to 427,027.32, 640,323.36 and 142,615.56

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Solution

The fourth proportional to 427,027.32, 640,323.36 and 142,615.56 is: 213,850.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,027.32 : 640,323.36 = 142,615.56 : x
  2. Step 2: Convert to fraction form
    427,027.32/640,323.36 = 142,615.56/x
  3. Step 3: Cross multiply
    427,027.32x = 640,323.36 × 142,615.56
  4. Step 4: Simplify right side
    427,027.32x = 91,320,074,567.48
  5. Step 5: Solve for x
    x = 91,320,074,567.48/427,027.32
  6. Step 6: Final answer
    x = 213,850.66

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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.