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Finding the Fourth Proportional to 426,951.06, 640,403.52 and 216,583.56

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Solution

The fourth proportional to 426,951.06, 640,403.52 and 216,583.56 is: 324,863.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,951.06 : 640,403.52 = 216,583.56 : x
  2. Step 2: Convert to fraction form
    426,951.06/640,403.52 = 216,583.56/x
  3. Step 3: Cross multiply
    426,951.06x = 640,403.52 × 216,583.56
  4. Step 4: Simplify right side
    426,951.06x = 138,700,874,198.13
  5. Step 5: Solve for x
    x = 138,700,874,198.13/426,951.06
  6. Step 6: Final answer
    x = 324,863.64

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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.