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Finding the Fourth Proportional to 638,311.60, 957,467.40 and 372,372.40

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Solution

The fourth proportional to 638,311.60, 957,467.40 and 372,372.40 is: 558,558.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,311.60 : 957,467.40 = 372,372.40 : x
  2. Step 2: Convert to fraction form
    638,311.60/957,467.40 = 372,372.40/x
  3. Step 3: Cross multiply
    638,311.60x = 957,467.40 × 372,372.40
  4. Step 4: Simplify right side
    638,311.60x = 356,534,433,659.76
  5. Step 5: Solve for x
    x = 356,534,433,659.76/638,311.60
  6. Step 6: Final answer
    x = 558,558.60

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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.