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Finding the Fourth Proportional to 285,694.80, 428,542.20 and 239,384.40

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Solution

The fourth proportional to 285,694.80, 428,542.20 and 239,384.40 is: 359,076.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,694.80 : 428,542.20 = 239,384.40 : x
  2. Step 2: Convert to fraction form
    285,694.80/428,542.20 = 239,384.40/x
  3. Step 3: Cross multiply
    285,694.80x = 428,542.20 × 239,384.40
  4. Step 4: Simplify right side
    285,694.80x = 102,586,317,421.68
  5. Step 5: Solve for x
    x = 102,586,317,421.68/285,694.80
  6. Step 6: Final answer
    x = 359,076.60

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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.