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Finding the Fourth Proportional to 283,991.25, 391,901.62 and 156,666.81

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Solution

The fourth proportional to 283,991.25, 391,901.62 and 156,666.81 is: 216,196.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,991.25 : 391,901.62 = 156,666.81 : x
  2. Step 2: Convert to fraction form
    283,991.25/391,901.62 = 156,666.81/x
  3. Step 3: Cross multiply
    283,991.25x = 391,901.62 × 156,666.81
  4. Step 4: Simplify right side
    283,991.25x = 61,397,976,639.23
  5. Step 5: Solve for x
    x = 61,397,976,639.23/283,991.25
  6. Step 6: Final answer
    x = 216,196.72

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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.