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Finding the Fourth Proportional to 703,076.90, 970,243.13 and 392,979.07

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Solution

The fourth proportional to 703,076.90, 970,243.13 and 392,979.07 is: 542,309.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,076.90 : 970,243.13 = 392,979.07 : x
  2. Step 2: Convert to fraction form
    703,076.90/970,243.13 = 392,979.07/x
  3. Step 3: Cross multiply
    703,076.90x = 970,243.13 × 392,979.07
  4. Step 4: Simplify right side
    703,076.90x = 381,285,240,986.18
  5. Step 5: Solve for x
    x = 381,285,240,986.18/703,076.90
  6. Step 6: Final answer
    x = 542,309.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.