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Finding the Fourth Proportional to 661,563.20, 992,037.60 and 287,393.60

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Solution

The fourth proportional to 661,563.20, 992,037.60 and 287,393.60 is: 430,956.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,563.20 : 992,037.60 = 287,393.60 : x
  2. Step 2: Convert to fraction form
    661,563.20/992,037.60 = 287,393.60/x
  3. Step 3: Cross multiply
    661,563.20x = 992,037.60 × 287,393.60
  4. Step 4: Simplify right side
    661,563.20x = 285,105,257,199.36
  5. Step 5: Solve for x
    x = 285,105,257,199.36/661,563.20
  6. Step 6: Final answer
    x = 430,956.95

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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.