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Finding the Fourth Proportional to 279,942.80, 420,011.40 and 122,284.40

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Solution

The fourth proportional to 279,942.80, 420,011.40 and 122,284.40 is: 183,469.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,942.80 : 420,011.40 = 122,284.40 : x
  2. Step 2: Convert to fraction form
    279,942.80/420,011.40 = 122,284.40/x
  3. Step 3: Cross multiply
    279,942.80x = 420,011.40 × 122,284.40
  4. Step 4: Simplify right side
    279,942.80x = 51,360,842,042.16
  5. Step 5: Solve for x
    x = 51,360,842,042.16/279,942.80
  6. Step 6: Final answer
    x = 183,469.06

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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.