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Finding the Fourth Proportional to 451,866.29, 676,730.78 and 392,378.68

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Solution

The fourth proportional to 451,866.29, 676,730.78 and 392,378.68 is: 587,640.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,866.29 : 676,730.78 = 392,378.68 : x
  2. Step 2: Convert to fraction form
    451,866.29/676,730.78 = 392,378.68/x
  3. Step 3: Cross multiply
    451,866.29x = 676,730.78 × 392,378.68
  4. Step 4: Simplify right side
    451,866.29x = 265,534,724,826.22
  5. Step 5: Solve for x
    x = 265,534,724,826.22/451,866.29
  6. Step 6: Final answer
    x = 587,640.04

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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.