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Finding the Fourth Proportional to 817,751.88, 1,128,510.36 and 455,179.68

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Solution

The fourth proportional to 817,751.88, 1,128,510.36 and 455,179.68 is: 628,155.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,751.88 : 1,128,510.36 = 455,179.68 : x
  2. Step 2: Convert to fraction form
    817,751.88/1,128,510.36 = 455,179.68/x
  3. Step 3: Cross multiply
    817,751.88x = 1,128,510.36 × 455,179.68
  4. Step 4: Simplify right side
    817,751.88x = 513,674,984,541.49
  5. Step 5: Solve for x
    x = 513,674,984,541.49/817,751.88
  6. Step 6: Final answer
    x = 628,155.06

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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.