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Finding the Fourth Proportional to 428,392.92, 641,567.92 and 248,097.40

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Solution

The fourth proportional to 428,392.92, 641,567.92 and 248,097.40 is: 371,554.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,392.92 : 641,567.92 = 248,097.40 : x
  2. Step 2: Convert to fraction form
    428,392.92/641,567.92 = 248,097.40/x
  3. Step 3: Cross multiply
    428,392.92x = 641,567.92 × 248,097.40
  4. Step 4: Simplify right side
    428,392.92x = 159,171,332,875.41
  5. Step 5: Solve for x
    x = 159,171,332,875.41/428,392.92
  6. Step 6: Final answer
    x = 371,554.54

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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.