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Finding the Fourth Proportional to 708,814.08, 978,187.05 and 386,541.81

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Solution

The fourth proportional to 708,814.08, 978,187.05 and 386,541.81 is: 533,440.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,814.08 : 978,187.05 = 386,541.81 : x
  2. Step 2: Convert to fraction form
    708,814.08/978,187.05 = 386,541.81/x
  3. Step 3: Cross multiply
    708,814.08x = 978,187.05 × 386,541.81
  4. Step 4: Simplify right side
    708,814.08x = 378,110,192,825.56
  5. Step 5: Solve for x
    x = 378,110,192,825.56/708,814.08
  6. Step 6: Final answer
    x = 533,440.58

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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.