Home / 817,761.35-1,128,485.54-455,175.90

Finding the Fourth Proportional to 817,761.35, 1,128,485.54 and 455,175.90

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Solution

The fourth proportional to 817,761.35, 1,128,485.54 and 455,175.90 is: 628,128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,761.35 : 1,128,485.54 = 455,175.90 : x
  2. Step 2: Convert to fraction form
    817,761.35/1,128,485.54 = 455,175.90/x
  3. Step 3: Cross multiply
    817,761.35x = 1,128,485.54 × 455,175.90
  4. Step 4: Simplify right side
    817,761.35x = 513,659,422,444.43
  5. Step 5: Solve for x
    x = 513,659,422,444.43/817,761.35
  6. Step 6: Final answer
    x = 628,128.76

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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.