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Finding the Fourth Proportional to 217,745.76, 326,491.50 and 84,470.28

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Solution

The fourth proportional to 217,745.76, 326,491.50 and 84,470.28 is: 126,656.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,745.76 : 326,491.50 = 84,470.28 : x
  2. Step 2: Convert to fraction form
    217,745.76/326,491.50 = 84,470.28/x
  3. Step 3: Cross multiply
    217,745.76x = 326,491.50 × 84,470.28
  4. Step 4: Simplify right side
    217,745.76x = 27,578,828,422.62
  5. Step 5: Solve for x
    x = 27,578,828,422.62/217,745.76
  6. Step 6: Final answer
    x = 126,656.10

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1.5x scale

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.