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Finding the Fourth Proportional to 708,814.08, 978,187.06 and 386,541.82

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Solution

The fourth proportional to 708,814.08, 978,187.06 and 386,541.82 is: 533,440.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,814.08 : 978,187.06 = 386,541.82 : x
  2. Step 2: Convert to fraction form
    708,814.08/978,187.06 = 386,541.82/x
  3. Step 3: Cross multiply
    708,814.08x = 978,187.06 × 386,541.82
  4. Step 4: Simplify right side
    708,814.08x = 378,110,206,472.85
  5. Step 5: Solve for x
    x = 378,110,206,472.85/708,814.08
  6. Step 6: Final answer
    x = 533,440.60

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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.