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Finding the Fourth Proportional to 518,786.67, 715,929.79 and 289,336.35

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Solution

The fourth proportional to 518,786.67, 715,929.79 and 289,336.35 is: 399,286.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,786.67 : 715,929.79 = 289,336.35 : x
  2. Step 2: Convert to fraction form
    518,786.67/715,929.79 = 289,336.35/x
  3. Step 3: Cross multiply
    518,786.67x = 715,929.79 × 289,336.35
  4. Step 4: Simplify right side
    518,786.67x = 207,144,514,798.77
  5. Step 5: Solve for x
    x = 207,144,514,798.77/518,786.67
  6. Step 6: Final answer
    x = 399,286.50

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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.