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Finding the Fourth Proportional to 393,590.70, 543,149.12 and 219,159.69

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Solution

The fourth proportional to 393,590.70, 543,149.12 and 219,159.69 is: 302,437.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,590.70 : 543,149.12 = 219,159.69 : x
  2. Step 2: Convert to fraction form
    393,590.70/543,149.12 = 219,159.69/x
  3. Step 3: Cross multiply
    393,590.70x = 543,149.12 × 219,159.69
  4. Step 4: Simplify right side
    393,590.70x = 119,036,391,667.17
  5. Step 5: Solve for x
    x = 119,036,391,667.17/393,590.70
  6. Step 6: Final answer
    x = 302,437.00

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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.