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Finding the Fourth Proportional to 647,789.20, 970,371.60 and 366,978.40

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Solution

The fourth proportional to 647,789.20, 970,371.60 and 366,978.40 is: 549,724.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,789.20 : 970,371.60 = 366,978.40 : x
  2. Step 2: Convert to fraction form
    647,789.20/970,371.60 = 366,978.40/x
  3. Step 3: Cross multiply
    647,789.20x = 970,371.60 × 366,978.40
  4. Step 4: Simplify right side
    647,789.20x = 356,105,417,173.44
  5. Step 5: Solve for x
    x = 356,105,417,173.44/647,789.20
  6. Step 6: Final answer
    x = 549,724.23

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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.