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Finding the Fourth Proportional to 518,628.26, 715,641.81 and 289,129.34

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Solution

The fourth proportional to 518,628.26, 715,641.81 and 289,129.34 is: 398,962.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,628.26 : 715,641.81 = 289,129.34 : x
  2. Step 2: Convert to fraction form
    518,628.26/715,641.81 = 289,129.34/x
  3. Step 3: Cross multiply
    518,628.26x = 715,641.81 × 289,129.34
  4. Step 4: Simplify right side
    518,628.26x = 206,913,044,201.71
  5. Step 5: Solve for x
    x = 206,913,044,201.71/518,628.26
  6. Step 6: Final answer
    x = 398,962.15

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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.