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Finding the Fourth Proportional to 437,813.64, 656,666.11 and 117,990.53

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Solution

The fourth proportional to 437,813.64, 656,666.11 and 117,990.53 is: 176,971.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,813.64 : 656,666.11 = 117,990.53 : x
  2. Step 2: Convert to fraction form
    437,813.64/656,666.11 = 117,990.53/x
  3. Step 3: Cross multiply
    437,813.64x = 656,666.11 × 117,990.53
  4. Step 4: Simplify right side
    437,813.64x = 77,480,382,351.94
  5. Step 5: Solve for x
    x = 77,480,382,351.94/437,813.64
  6. Step 6: Final answer
    x = 176,971.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.