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Finding the Fourth Proportional to 518,521.96, 715,602.93 and 285,994.45

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Solution

The fourth proportional to 518,521.96, 715,602.93 and 285,994.45 is: 394,695.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,521.96 : 715,602.93 = 285,994.45 : x
  2. Step 2: Convert to fraction form
    518,521.96/715,602.93 = 285,994.45/x
  3. Step 3: Cross multiply
    518,521.96x = 715,602.93 × 285,994.45
  4. Step 4: Simplify right side
    518,521.96x = 204,658,466,383.74
  5. Step 5: Solve for x
    x = 204,658,466,383.74/518,521.96
  6. Step 6: Final answer
    x = 394,695.85

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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.