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Finding the Fourth Proportional to 709,165.01, 978,650.06 and 386,881.91

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Solution

The fourth proportional to 709,165.01, 978,650.06 and 386,881.91 is: 533,898.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,165.01 : 978,650.06 = 386,881.91 : x
  2. Step 2: Convert to fraction form
    709,165.01/978,650.06 = 386,881.91/x
  3. Step 3: Cross multiply
    709,165.01x = 978,650.06 × 386,881.91
  4. Step 4: Simplify right side
    709,165.01x = 378,622,004,434.42
  5. Step 5: Solve for x
    x = 378,622,004,434.42/709,165.01
  6. Step 6: Final answer
    x = 533,898.32

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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.