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Finding the Fourth Proportional to 638,997.78, 881,859.72 and 367,153.68

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Solution

The fourth proportional to 638,997.78, 881,859.72 and 367,153.68 is: 506,696.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,997.78 : 881,859.72 = 367,153.68 : x
  2. Step 2: Convert to fraction form
    638,997.78/881,859.72 = 367,153.68/x
  3. Step 3: Cross multiply
    638,997.78x = 881,859.72 × 367,153.68
  4. Step 4: Simplify right side
    638,997.78x = 323,778,041,441.77
  5. Step 5: Solve for x
    x = 323,778,041,441.77/638,997.78
  6. Step 6: Final answer
    x = 506,696.66

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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.