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Finding the Fourth Proportional to 527,187.69, 790,774.11 and 127,831.77

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Solution

The fourth proportional to 527,187.69, 790,774.11 and 127,831.77 is: 191,745.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,187.69 : 790,774.11 = 127,831.77 : x
  2. Step 2: Convert to fraction form
    527,187.69/790,774.11 = 127,831.77/x
  3. Step 3: Cross multiply
    527,187.69x = 790,774.11 × 127,831.77
  4. Step 4: Simplify right side
    527,187.69x = 101,086,054,151.48
  5. Step 5: Solve for x
    x = 101,086,054,151.48/527,187.69
  6. Step 6: Final answer
    x = 191,745.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.