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Finding the Fourth Proportional to 471,765.60, 705,986.28 and 386,501.76

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Solution

The fourth proportional to 471,765.60, 705,986.28 and 386,501.76 is: 578,390.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,765.60 : 705,986.28 = 386,501.76 : x
  2. Step 2: Convert to fraction form
    471,765.60/705,986.28 = 386,501.76/x
  3. Step 3: Cross multiply
    471,765.60x = 705,986.28 × 386,501.76
  4. Step 4: Simplify right side
    471,765.60x = 272,864,939,755.85
  5. Step 5: Solve for x
    x = 272,864,939,755.85/471,765.60
  6. Step 6: Final answer
    x = 578,390.92

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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.