Home / 817,758.70-1,128,400.20-455,197.84

Finding the Fourth Proportional to 817,758.70, 1,128,400.20 and 455,197.84

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Solution

The fourth proportional to 817,758.70, 1,128,400.20 and 455,197.84 is: 628,113.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,758.70 : 1,128,400.20 = 455,197.84 : x
  2. Step 2: Convert to fraction form
    817,758.70/1,128,400.20 = 455,197.84/x
  3. Step 3: Cross multiply
    817,758.70x = 1,128,400.20 × 455,197.84
  4. Step 4: Simplify right side
    817,758.70x = 513,645,333,695.57
  5. Step 5: Solve for x
    x = 513,645,333,695.57/817,758.70
  6. Step 6: Final answer
    x = 628,113.57

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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.