Home / 280,550.56-387,145.20-153,201.28

Finding the Fourth Proportional to 280,550.56, 387,145.20 and 153,201.28

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Solution

The fourth proportional to 280,550.56, 387,145.20 and 153,201.28 is: 211,409.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,550.56 : 387,145.20 = 153,201.28 : x
  2. Step 2: Convert to fraction form
    280,550.56/387,145.20 = 153,201.28/x
  3. Step 3: Cross multiply
    280,550.56x = 387,145.20 × 153,201.28
  4. Step 4: Simplify right side
    280,550.56x = 59,311,140,185.86
  5. Step 5: Solve for x
    x = 59,311,140,185.86/280,550.56
  6. Step 6: Final answer
    x = 211,409.81

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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.