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Finding the Fourth Proportional to 398,637.28, 550,123.74 and 217,347.73

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Solution

The fourth proportional to 398,637.28, 550,123.74 and 217,347.73 is: 299,942.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,637.28 : 550,123.74 = 217,347.73 : x
  2. Step 2: Convert to fraction form
    398,637.28/550,123.74 = 217,347.73/x
  3. Step 3: Cross multiply
    398,637.28x = 550,123.74 × 217,347.73
  4. Step 4: Simplify right side
    398,637.28x = 119,568,146,108.11
  5. Step 5: Solve for x
    x = 119,568,146,108.11/398,637.28
  6. Step 6: Final answer
    x = 299,942.21

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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.