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Finding the Fourth Proportional to 518,599.46, 715,614.77 and 289,135.01

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Solution

The fourth proportional to 518,599.46, 715,614.77 and 289,135.01 is: 398,977.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,599.46 : 715,614.77 = 289,135.01 : x
  2. Step 2: Convert to fraction form
    518,599.46/715,614.77 = 289,135.01/x
  3. Step 3: Cross multiply
    518,599.46x = 715,614.77 × 289,135.01
  4. Step 4: Simplify right side
    518,599.46x = 206,909,278,656.35
  5. Step 5: Solve for x
    x = 206,909,278,656.35/518,599.46
  6. Step 6: Final answer
    x = 398,977.05

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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.