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Finding the Fourth Proportional to 518,998.44, 716,222.98 and 289,553.78

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Solution

The fourth proportional to 518,998.44, 716,222.98 and 289,553.78 is: 399,587.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,998.44 : 716,222.98 = 289,553.78 : x
  2. Step 2: Convert to fraction form
    518,998.44/716,222.98 = 289,553.78/x
  3. Step 3: Cross multiply
    518,998.44x = 716,222.98 × 289,553.78
  4. Step 4: Simplify right side
    518,998.44x = 207,385,071,181.86
  5. Step 5: Solve for x
    x = 207,385,071,181.86/518,998.44
  6. Step 6: Final answer
    x = 399,587.08

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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.