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Finding the Fourth Proportional to 398,983.72, 550,596.73 and 217,695.55

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Solution

The fourth proportional to 398,983.72, 550,596.73 and 217,695.55 is: 300,419.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,983.72 : 550,596.73 = 217,695.55 : x
  2. Step 2: Convert to fraction form
    398,983.72/550,596.73 = 217,695.55/x
  3. Step 3: Cross multiply
    398,983.72x = 550,596.73 × 217,695.55
  4. Step 4: Simplify right side
    398,983.72x = 119,862,457,965.55
  5. Step 5: Solve for x
    x = 119,862,457,965.55/398,983.72
  6. Step 6: Final answer
    x = 300,419.42

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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.