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Finding the Fourth Proportional to 398,828.64, 550,385.25 and 217,544.46

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Solution

The fourth proportional to 398,828.64, 550,385.25 and 217,544.46 is: 300,212.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,828.64 : 550,385.25 = 217,544.46 : x
  2. Step 2: Convert to fraction form
    398,828.64/550,385.25 = 217,544.46/x
  3. Step 3: Cross multiply
    398,828.64x = 550,385.25 × 217,544.46
  4. Step 4: Simplify right side
    398,828.64x = 119,733,262,003.22
  5. Step 5: Solve for x
    x = 119,733,262,003.22/398,828.64
  6. Step 6: Final answer
    x = 300,212.30

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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.