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Finding the Fourth Proportional to 283,998.86, 391,918.40 and 156,674.45

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Solution

The fourth proportional to 283,998.86, 391,918.40 and 156,674.45 is: 216,210.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,998.86 : 391,918.40 = 156,674.45 : x
  2. Step 2: Convert to fraction form
    283,998.86/391,918.40 = 156,674.45/x
  3. Step 3: Cross multiply
    283,998.86x = 391,918.40 × 156,674.45
  4. Step 4: Simplify right side
    283,998.86x = 61,403,597,021.92
  5. Step 5: Solve for x
    x = 61,403,597,021.92/283,998.86
  6. Step 6: Final answer
    x = 216,210.72

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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.