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Finding the Fourth Proportional to 389,570.65, 537,605.44 and 217,478.59

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Solution

The fourth proportional to 389,570.65, 537,605.44 and 217,478.59 is: 300,119.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,570.65 : 537,605.44 = 217,478.59 : x
  2. Step 2: Convert to fraction form
    389,570.65/537,605.44 = 217,478.59/x
  3. Step 3: Cross multiply
    389,570.65x = 537,605.44 × 217,478.59
  4. Step 4: Simplify right side
    389,570.65x = 116,917,673,067.53
  5. Step 5: Solve for x
    x = 116,917,673,067.53/389,570.65
  6. Step 6: Final answer
    x = 300,119.31

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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.