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Finding the Fourth Proportional to 842,578.64, 1,162,474.62 and 479,745.88

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Solution

The fourth proportional to 842,578.64, 1,162,474.62 and 479,745.88 is: 661,887.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    842,578.64 : 1,162,474.62 = 479,745.88 : x
  2. Step 2: Convert to fraction form
    842,578.64/1,162,474.62 = 479,745.88/x
  3. Step 3: Cross multiply
    842,578.64x = 1,162,474.62 × 479,745.88
  4. Step 4: Simplify right side
    842,578.64x = 557,692,409,549.57
  5. Step 5: Solve for x
    x = 557,692,409,549.57/842,578.64
  6. Step 6: Final answer
    x = 661,887.67

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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.