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Finding the Fourth Proportional to 618,358.44, 853,751.90 and 386,140.16

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Solution

The fourth proportional to 618,358.44, 853,751.90 and 386,140.16 is: 533,133.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,358.44 : 853,751.90 = 386,140.16 : x
  2. Step 2: Convert to fraction form
    618,358.44/853,751.90 = 386,140.16/x
  3. Step 3: Cross multiply
    618,358.44x = 853,751.90 × 386,140.16
  4. Step 4: Simplify right side
    618,358.44x = 329,667,895,266.30
  5. Step 5: Solve for x
    x = 329,667,895,266.30/618,358.44
  6. Step 6: Final answer
    x = 533,133.98

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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.