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Finding the Fourth Proportional to 621,459.93, 857,680.51 and 379,883.91

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Solution

The fourth proportional to 621,459.93, 857,680.51 and 379,883.91 is: 524,280.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,459.93 : 857,680.51 = 379,883.91 : x
  2. Step 2: Convert to fraction form
    621,459.93/857,680.51 = 379,883.91/x
  3. Step 3: Cross multiply
    621,459.93x = 857,680.51 × 379,883.91
  4. Step 4: Simplify right side
    621,459.93x = 325,819,025,669.59
  5. Step 5: Solve for x
    x = 325,819,025,669.59/621,459.93
  6. Step 6: Final answer
    x = 524,280.02

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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.