Home / 427,025.32-640,320.36-142,613.56

Finding the Fourth Proportional to 427,025.32, 640,320.36 and 142,613.56

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Solution

The fourth proportional to 427,025.32, 640,320.36 and 142,613.56 is: 213,847.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,025.32 : 640,320.36 = 142,613.56 : x
  2. Step 2: Convert to fraction form
    427,025.32/640,320.36 = 142,613.56/x
  3. Step 3: Cross multiply
    427,025.32x = 640,320.36 × 142,613.56
  4. Step 4: Simplify right side
    427,025.32x = 91,318,366,080.08
  5. Step 5: Solve for x
    x = 91,318,366,080.08/427,025.32
  6. Step 6: Final answer
    x = 213,847.66

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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.