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Finding the Fourth Proportional to 518,669.06, 715,775.96 and 289,224.11

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Solution

The fourth proportional to 518,669.06, 715,775.96 and 289,224.11 is: 399,136.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,669.06 : 715,775.96 = 289,224.11 : x
  2. Step 2: Convert to fraction form
    518,669.06/715,775.96 = 289,224.11/x
  3. Step 3: Cross multiply
    518,669.06x = 715,775.96 × 289,224.11
  4. Step 4: Simplify right side
    518,669.06x = 207,019,664,818.74
  5. Step 5: Solve for x
    x = 207,019,664,818.74/518,669.06
  6. Step 6: Final answer
    x = 399,136.33

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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.