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Finding the Fourth Proportional to 398,984.94, 550,600.94 and 217,700.66

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Solution

The fourth proportional to 398,984.94, 550,600.94 and 217,700.66 is: 300,427.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,984.94 : 550,600.94 = 217,700.66 : x
  2. Step 2: Convert to fraction form
    398,984.94/550,600.94 = 217,700.66/x
  3. Step 3: Cross multiply
    398,984.94x = 550,600.94 × 217,700.66
  4. Step 4: Simplify right side
    398,984.94x = 119,866,189,955.37
  5. Step 5: Solve for x
    x = 119,866,189,955.37/398,984.94
  6. Step 6: Final answer
    x = 300,427.86

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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.