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Finding the Fourth Proportional to 500,085.27, 690,118.11 and 285,219.81

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Solution

The fourth proportional to 500,085.27, 690,118.11 and 285,219.81 is: 393,603.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,085.27 : 690,118.11 = 285,219.81 : x
  2. Step 2: Convert to fraction form
    500,085.27/690,118.11 = 285,219.81/x
  3. Step 3: Cross multiply
    500,085.27x = 690,118.11 × 285,219.81
  4. Step 4: Simplify right side
    500,085.27x = 196,835,356,211.76
  5. Step 5: Solve for x
    x = 196,835,356,211.76/500,085.27
  6. Step 6: Final answer
    x = 393,603.59

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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.