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Finding the Fourth Proportional to 538,911.40, 808,658.70 and 239,438.20

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Solution

The fourth proportional to 538,911.40, 808,658.70 and 239,438.20 is: 359,286.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,911.40 : 808,658.70 = 239,438.20 : x
  2. Step 2: Convert to fraction form
    538,911.40/808,658.70 = 239,438.20/x
  3. Step 3: Cross multiply
    538,911.40x = 808,658.70 × 239,438.20
  4. Step 4: Simplify right side
    538,911.40x = 193,623,783,542.34
  5. Step 5: Solve for x
    x = 193,623,783,542.34/538,911.40
  6. Step 6: Final answer
    x = 359,286.86

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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.