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Finding the Fourth Proportional to 518,368.78, 715,262.19 and 288,875.73

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Solution

The fourth proportional to 518,368.78, 715,262.19 and 288,875.73 is: 398,600.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,368.78 : 715,262.19 = 288,875.73 : x
  2. Step 2: Convert to fraction form
    518,368.78/715,262.19 = 288,875.73/x
  3. Step 3: Cross multiply
    518,368.78x = 715,262.19 × 288,875.73
  4. Step 4: Simplify right side
    518,368.78x = 206,621,885,833.27
  5. Step 5: Solve for x
    x = 206,621,885,833.27/518,368.78
  6. Step 6: Final answer
    x = 398,600.17

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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.